regulator: dt-bindings: maxim,max77693: Convert to dtschema

Convert the regulator bindings of Maxim MAX77693 MUIC to DT schema format.
The existing bindings were defined in ../bindings/mfd/max77693.txt.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

Documentation/devicetree/bindings/regulator/maxim,max77693.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/maxim,max77693.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX77693 MicroUSB and Companion Power Management IC regulators
+
+maintainers:
+  - Chanwoo Choi <cw00.choi@samsung.com>
+  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+
+description: |
+  This is a part of device tree bindings for Maxim MAX77693 MicroUSB Integrated
+  Circuit (MUIC).
+
+  See also Documentation/devicetree/bindings/mfd/maxim,max77693.yaml for
+  additional information and example.
+
+properties:
+  CHARGER:
+    type: object
+    $ref: regulator.yaml#
+    additionalProperties: false
+    description: |
+      Current regulator.
+
+    properties:
+      regulator-name: true
+      regulator-always-on: true
+      regulator-boot-on: true
+      regulator-min-microamp:
+        minimum: 60000
+      regulator-max-microamp:
+        maximum: 2580000
+
+    required:
+      - regulator-name
+
+patternProperties:
+  "^ESAFEOUT[12]$":
+    type: object
+    $ref: regulator.yaml#
+    additionalProperties: false
+    description: |
+      Safeout LDO regulator.
+
+    properties:
+      regulator-name: true
+      regulator-always-on: true
+      regulator-boot-on: true
+      regulator-min-microvolt:
+        minimum: 3300000
+      regulator-max-microvolt:
+        maximum: 4950000
+
+    required:
+      - regulator-name
+
+additionalProperties: false