dt-bindings: phy: ralink-usb-phy: convert to dtschema

Convert the ralink-usb-phy bindings to DT schema.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231022163006.803800-1-sergio.paracuellos@gmail.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/mediatek,mt7628-usbphy.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/mediatek,mt7628-usbphy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek/Ralink USB PHY
+
+maintainers:
+  - Sergio Paracuellos <sergio.paracuellos@gmail.com>
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt7620-usbphy
+      - mediatek,mt7628-usbphy
+      - ralink,rt3352-usbphy
+
+  reg:
+    maxItems: 1
+
+  "#phy-cells":
+    const: 0
+
+  ralink,sysctl:
+    description:
+      phandle to a ralink syscon register region.
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+  resets:
+    items:
+      - description: USB Host reset controller
+      - description: USB Device reset controller
+
+  reset-names:
+    items:
+      - const: host
+      - const: device
+
+required:
+  - compatible
+  - "#phy-cells"
+  - ralink,sysctl
+  - resets
+  - reset-names
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt7628-usbphy
+    then:
+      required:
+        - reg
+    else:
+      properties:
+        reg: false
+
+additionalProperties: false
+
+examples:
+  - |
+    phy@10120000 {
+      compatible = "mediatek,mt7628-usbphy";
+      reg = <0x10120000 0x1000>;
+      #phy-cells = <0>;
+      ralink,sysctl = <&sysc>;
+      resets = <&rstctrl 22>,
+               <&rstctrl 25>;
+      reset-names = "host", "device";
+    };
+
+...

Documentation/devicetree/bindings/phy/ralink-usb-phy.txt

-Mediatek/Ralink USB PHY
-
-Required properties:
- - compatible: "ralink,rt3352-usbphy"
-	       "mediatek,mt7620-usbphy"
-	       "mediatek,mt7628-usbphy"
- - reg: required for "mediatek,mt7628-usbphy", unused otherwise
- - #phy-cells: should be 0
- - ralink,sysctl: a phandle to a ralink syscon register region
- - resets: the two reset controllers for host and device
- - reset-names: the names of the 2 reset controllers
-
-Example:
-
-usbphy: phy {
-	compatible = "mediatek,mt7628-usbphy";
-	reg = <0x10120000 0x1000>;
-	#phy-cells = <0>;
-
-	ralink,sysctl = <&sysc>;
-	resets = <&rstctrl 22 &rstctrl 25>;
-	reset-names = "host", "device";
-};