regulator: bindings: Drop document bindings for mpq7920

This reverts commit f5fa59a6 "regulator: bindings: add
document bindings for mpq7920" as Rob has a number of problems
with the use of DT schema.
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/mps,mpq7920.yaml

-# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
-%YAML 1.2
----
-$id: http://devicetree.org/schemas/regulator/mps,mpq7920.yaml#
-$schema: http://devicetree.org/meta-schemas/core.yaml#
-
-title: Monolithic Power System MPQ7920 PMIC
-
-maintainers:
-  - Saravanan Sekar <sravanhome@gmail.com>
-
-properties:
-  $nodename:
-    pattern: "pmic@[0-9a-f]{1,2}"
-  compatible:
-    enum:
-      - mps,mpq7920
-
-  reg:
-    maxItems: 1
-
-  regulators:
-    type: object
-    description: |
-      list of regulators provided by this controller, must be named
-      after their hardware counterparts BUCK[1-4], one LDORTC, and LDO[2-5]
-
-      mps,switch-freq:
-        description: |
-          switching frequency must be one of following corresponding value
-          1.1MHz, 1.65MHz, 2.2MHz, 2.75MHz
-        $ref: "/schemas/types.yaml#/definitions/uint8"
-        enum: [ 0, 1, 2, 3 ]
-        default: 2
-
-      buck1:
-        type: object
-        $ref: "regulator.yaml#"
-        description: |
-          4.5A DC-DC step down converter
-
-        mps,buck-softstart:
-           $ref: "/schemas/types.yaml#/definitions/uint8"
-           enum: [ 0, 1, 2, 3 ]
-           default: 1
-           description: |
-             defines the soft start time of this buck, must be one of the following
-             corresponding values 150us, 300us, 610us, 920us
-
-         mps,buck-phase-delay:
-           $ref: "/schemas/types.yaml#/definitions/uint8"
-           enum: [ 0, 1, 2, 3 ]
-           default: 0
-           description: |
-             defines the phase delay of this buck, must be one of the following
-             corresponding values 0deg, 90deg, 180deg, 270deg
-
-         mps,buck-ovp-disable:
-           type: boolean
-           description: |
-             disables over voltage protection of this buck
-
-      buck2:
-        type: object
-        $ref: "regulator.yaml#"
-        description: |
-          2.5A DC-DC step down converter
-
-        mps,buck-softstart:
-          description: |
-            defines the soft start time of this buck, must be one of the following
-            corresponding values 150us, 300us, 610us, 920us
-          $ref: "/schemas/types.yaml#/definitions/uint8"
-          enum: [ 0, 1, 2, 3 ]
-          default: 1
-
-        mps,buck-phase-delay:
-          description: |
-            defines the phase delay of this buck, must be one of the following
-            corresponding values 0deg, 90deg, 180deg, 270deg
-          $ref: "/schemas/types.yaml#/definitions/uint8"
-          enum: [ 0, 1, 2, 3 ]
-          default: 0
-
-        mps,buck-ovp-disable:
-          description: |
-            disables over voltage protection of this buck
-          type: boolean
-
-      buck3:
-        type: object
-        $ref: "regulator.yaml#"
-        description: |
-          4.5A DC-DC step down converter
-
-        mps,buck-softstart:
-           description: |
-             defines the soft start time of this buck, must be one of the following
-             corresponding values 150us, 300us, 610us, 920us
-           $ref: "/schemas/types.yaml#/definitions/uint8"
-           enum: [ 0, 1, 2, 3 ]
-           default: 1
-
-         mps,buck-phase-delay:
-           description: |
-             defines the phase delay of this buck, must be one of the following
-             corresponding values 0deg, 90deg, 180deg, 270deg
-           $ref: "/schemas/types.yaml#/definitions/uint8"
-           enum: [ 0, 1, 2, 3 ]
-           default: 1
-
-         mps,buck-ovp-disable:
-           description: |
-             disables over voltage protection of this buck
-           type: boolean
-
-      buck4:
-        type: object
-        $ref: "regulator.yaml#"
-        description: |
-          2.5A DC-DC step down converter
-
-        mps,buck-softstart:
-          description: |
-            defines the soft start time of this buck, must be one of the following
-            corresponding values 150us, 300us, 610us, 920us
-          $ref: "/schemas/types.yaml#/definitions/uint8"
-          enum: [ 0, 1, 2, 3 ]
-          default: 1
-
-        mps,buck-phase-delay:
-          description: |
-            defines the phase delay of this buck, must be one of the following
-            corresponding values 0deg, 90deg, 180deg, 270deg
-          $ref: "/schemas/types.yaml#/definitions/uint8"
-          enum: [ 0, 1, 2, 3 ]
-          default: 1
-
-        mps,buck-ovp-disable:
-          description: |
-            disables over voltage protection of this buck
-          type: boolean
-
-      ldortc:
-        $ref: "regulator.yaml#"
-        description: |
-          regulator with 0.65V-3.5875V for RTC, always enabled
-
-      ldo2:
-        $ref: "regulator.yaml#"
-        description: |
-          regulator with 0.65V-3.5875V
-
-      ldo3:
-        $ref: "regulator.yaml#"
-        description: |
-          regulator with 0.65V-3.5875V
-
-      ldo4:
-        $ref: "regulator.yaml#"
-        description: |
-          regulator with 0.65V-3.5875V
-
-      ldo5:
-        $ref: "regulator.yaml#"
-        description: |
-          regulator with 0.65V-3.5875V
-
-examples:
-  - |
-    i2c {
-        #address-cells = <1>;
-        #size-cells = <0>;
-
-        pmic@69 {
-          compatible = "mps,mpq7920";
-          reg = <0x69>;
-
-          regulators {
-            mps,switch-freq = <1>;
-
-            buck1 {
-             regulator-name = "buck1";
-             regulator-min-microvolt = <400000>;
-             regulator-max-microvolt = <3587500>;
-             regulator-min-microamp  = <460000>;
-             regulator-max-microamp  = <7600000>;
-             regulator-boot-on;
-             mps,buck-ovp-disable;
-             mps,buck-phase-delay = <2>;
-             mps,buck-softstart = <1>;
-            };
-
-            ldo2 {
-             regulator-name = "ldo2";
-             regulator-min-microvolt = <650000>;
-             regulator-max-microvolt = <3587500>;
-            };
-         };
-       };
-     };
-...