regulator: dt-bindings: mt6358: Convert to DT schema

Convert this from the old style text based binding to the new DT schema
style. This will make adding the MT6366 portion easier.

The examples have been trimmed down considerably, and the remaining
entries now match what is seen in actual device trees, minus some
properties that aren't covered by the bindings yet, or don't make
sense on their own.

The original submitter seems to have left MediaTek, so instead the
submitter and maintainer for the MT6366 binding is listed as the
maintainer here.

Cc: Zhiyong Tao <zhiyong.tao@mediatek.com>
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230928085537.3246669-3-wenst@chromium.orgSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/mediatek,mt6358-regulator.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/mediatek,mt6358-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT6358 Regulator
+
+maintainers:
+  - Zhiyong Tao <zhiyong.tao@mediatek.com>
+
+description:
+  Regulator node of the PMIC. This node should under the PMIC's device node.
+  All voltage regulators provided by the PMIC are described as sub-nodes of
+  this node.
+
+properties:
+  compatible:
+    const: mediatek,mt6358-regulator
+
+  ldo_vxo22:
+    description: LDOs with fixed 2.2V output and 0~100/10mV tuning
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  ldo_vusb:
+    description: LDOs with fixed 3.0V output and 0~100/10mV tuning
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+
+patternProperties:
+  "^buck_v(core|dram1|gpu|modem|pa|proc1[12]|s[12])$":
+    description: Buck regulators
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  "^ldo_v(a|rf)12$":
+    description: LDOs with fixed 1.2V output and 0~100/10mV tuning
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  "^ldo_v((aux|cn|io|rf)18|camio)$":
+    description: LDOs with fixed 1.8V output and 0~100/10mV tuning
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  "^ldo_v(aud|bif|cn|fe|io)28$":
+    description: LDOs with fixed 2.8V output and 0~100/10mV tuning
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  "^ldo_vsram_(gpu|others|proc1[12])$":
+    description: LDOs with variable output
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  "^ldo_v(cama[12]|camd|cn33|dram2|efuse|emc|ibr|ldo28|mc|mch|sim[12])$":
+    description: LDOs with variable output and 0~100/10mV tuning
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    regulator {
+        compatible = "mediatek,mt6358-regulator";
+
+        buck_vgpu {
+            regulator-name = "vgpu";
+            regulator-min-microvolt = <625000>;
+            regulator-max-microvolt = <900000>;
+            regulator-ramp-delay = <6250>;
+            regulator-enable-ramp-delay = <200>;
+        };
+
+        ldo_vsram_gpu {
+            regulator-name = "vsram_gpu";
+            regulator-min-microvolt = <850000>;
+            regulator-max-microvolt = <1000000>;
+            regulator-ramp-delay = <6250>;
+            regulator-enable-ramp-delay = <240>;
+        };
+    };
+
+...