dt-bindings: phy: Add Amlogic A1 USB2 PHY Bindings

Add the Amlogic A1 Family USB2 PHY Bindings

It supports Host mode only.
Signed-off-by: Yue Wang <yue.wang@amlogic.com>
Signed-off-by: Hanjie Lin <hanjie.lin@amlogic.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Documentation/devicetree/bindings/phy/amlogic,meson-g12a-usb2-phy.yaml

@@ -14,6 +14,7 @@ properties:
   compatible:
     enum:
       - amlogic,meson-g12a-usb2-phy
+      - amlogic,meson-a1-usb2-phy
 
   reg:
     maxItems: 1
@@ -49,6 +50,19 @@ required:
   - reset-names
   - "#phy-cells"
 
+if:
+  properties:
+    compatible:
+      enum:
+        - amlogic,meson-a1-usb-ctrl
+
+then:
+  properties:
+    power-domains:
+      maxItems: 1
+  required:
+    - power-domains
+
 examples:
   - |
     phy@36000 {