dt-bindings: regulator: max77541: Add ADI MAX77541/MAX77540 Regulator

Add ADI MAX77541/MAX77540 Regulator devicetree document.
Signed-off-by: Okan Sahin <okan.sahin@analog.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230412111256.40013-2-okan.sahin@analog.comSigned-off-by: Lee Jones <lee@kernel.org>

Documentation/devicetree/bindings/regulator/adi,max77541-regulator.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/adi,max77541-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Buck Converter for MAX77540/MAX77541
+
+maintainers:
+  - Okan Sahin <okan.sahin@analog.com>
+
+description: |
+  This is a part of device tree bindings for ADI MAX77540/MAX77541
+
+  The buck converter is represented as a sub-node of the PMIC node on the device tree.
+
+  The device has two buck regulators.
+  See also Documentation/devicetree/bindings/mfd/adi,max77541.yaml for
+  additional information and example.
+
+patternProperties:
+  "^buck[12]$":
+    type: object
+    $ref: regulator.yaml#
+    additionalProperties: false
+    description: |
+      Buck regulator.
+
+    properties:
+      regulator-name: true
+      regulator-always-on: true
+      regulator-boot-on: true
+      regulator-min-microvolt:
+        minimum: 300000
+      regulator-max-microvolt:
+        maximum: 5200000
+
+additionalProperties: false