dt-bindings: phy: Convert brcm,sr-usb-combo-phy to DT schema

Convert the Broadcom Stingray USB PHY binding to DT schema format. It's
a straight forward conversion.

Signed-off-by: Rob Herring (Arm) <[e-mail]>
Reviewed-by: Florian Fainelli <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

Documentation/devicetree/bindings/phy/brcm,sr-usb-combo-phy.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/brcm,sr-usb-combo-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom Stingray USB PHY
+
+maintainers:
+  - Ray Jui <[e-mail]>
+  - Scott Branden <[e-mail]>
+
+properties:
+  compatible:
+    enum:
+      - brcm,sr-usb-combo-phy
+      - brcm,sr-usb-hs-phy
+
+  reg:
+    maxItems: 1
+
+  '#phy-cells':
+    description: PHY cell count indicating PHY type
+    enum: [ 0, 1 ]
+
+required:
+  - compatible
+  - reg
+  - '#phy-cells'
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: brcm,sr-usb-combo-phy
+    then:
+      properties:
+        '#phy-cells':
+          const: 1
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: brcm,sr-usb-hs-phy
+    then:
+      properties:
+        '#phy-cells':
+          const: 0
+
+additionalProperties: false
+
+examples:
+  - |
+    usb-phy@0 {
+        compatible = "brcm,sr-usb-combo-phy";
+        reg = <0x00000000 0x100>;
+        #phy-cells = <1>;
+    };
+  - |
+    usb-phy@20000 {
+        compatible = "brcm,sr-usb-hs-phy";
+        reg = <0x00020000 0x100>;
+        #phy-cells = <0>;
+    };

Documentation/devicetree/bindings/phy/brcm,stingray-usb-phy.txt

···
-Broadcom Stingray USB PHY
-
-Required properties:
- - compatible : should be one of the listed compatibles
-	- "brcm,sr-usb-combo-phy" is combo PHY has two PHYs, one SS and one HS.
-	- "brcm,sr-usb-hs-phy" is a single HS PHY.
- - reg: offset and length of the PHY blocks registers
- - #phy-cells:
-   - Must be 1 for brcm,sr-usb-combo-phy as it expects one argument to indicate
-     the PHY number of two PHYs. 0 for HS PHY and 1 for SS PHY.
-   - Must be 0 for brcm,sr-usb-hs-phy.
-
-Refer to phy/phy-bindings.txt for the generic PHY binding properties
-
-Example:
-	usbphy0: usb-phy@0 {
-		compatible = "brcm,sr-usb-combo-phy";
-		reg = <0x00000000 0x100>;
-		#phy-cells = <1>;
-	};
-
-	usbphy1: usb-phy@10000 {
-		compatible = "brcm,sr-usb-combo-phy";
-		reg = <0x00010000 0x100>,
-		#phy-cells = <1>;
-	};
-
-	usbphy2: usb-phy@20000 {
-		compatible = "brcm,sr-usb-hs-phy";
-		reg = <0x00020000 0x100>,
-		#phy-cells = <0>;
-	};