dt-bindings: phy: qcom,qmp-usb3-dp: add missing power-domains property

At least the "qcom,sc8280xp-qmp-usb43dp-phy" binding requires a power
domain to be specified.

Fixes: aa27597e59 ("dt-bindings: phy: qcom,qmp: Add compatible for SC8280XP USB phys")
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220902080705.12050-3-johan+linaro@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/qcom,qmp-usb3-dp-phy.yaml

@@ -53,6 +53,9 @@ properties:
       - const: ref
       - const: com_aux
 
+  power-domains:
+    maxItems: 1
+
   resets:
     items:
       - description: reset of phy block.
@@ -159,6 +162,17 @@ required:
 
 additionalProperties: false
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sc8280xp-qmp-usb43dp-phy
+    then:
+      required:
+        - power-domains
+
 examples:
   - |
     #include <dt-bindings/clock/qcom,gcc-sdm845.h>