dt-bindings: phy: qcom,qmp-usb: fix bindings error

Merge two allOf clauses, which sneaked in in two different patches.

Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-usb3-uni-phy.yaml:109:1: found duplicate key "allOf" with value "[]" (original value: "[]")
Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-usb3-uni-phy.yaml:109:1: [error] duplication of key "allOf" in mapping (key-duplicates)
Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-usb3-uni-phy.yaml:109:1: found duplicate key "allOf" with value "[]" (original value: "[]")
Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-usb3-uni-phy.yaml: ignoring, error parsing file

Fixes: 2daece5eb51e ("dt-bindings: phy: qcom,qmp-usb: Drop legacy bindings and move to newer one (SM6115 & QCM2290)")
Signed-off-by: Dmitry Baryshkov <[e-mail]>
Reviewed-by: Conor Dooley <[e-mail]>
Reviewed-by: Bhupesh Sharma <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-usb3-uni-phy.yaml

···
         compatible:
           contains:
             enum:
-              - qcom,sa8775p-qmp-usb3-uni-phy
-              - qcom,sc8280xp-qmp-usb3-uni-phy
-    then:
-      properties:
-        clocks:
-          maxItems: 4
-        clock-names:
-          items:
-            - const: aux
-            - const: ref
-            - const: com_aux
-            - const: pipe
-      required:
-        - power-domains
-
-additionalProperties: false
-
-allOf:
-  - if:
-      properties:
-        compatible:
-          contains:
-            enum:
               - qcom,qcm2290-qmp-usb3-phy
               - qcom,sm6115-qmp-usb3-phy
     then:
···
         compatible:
           contains:
             enum:
+              - qcom,sa8775p-qmp-usb3-uni-phy
               - qcom,sc8280xp-qmp-usb3-uni-phy
     then:
       properties:
···
             - const: ref
             - const: com_aux
             - const: pipe
+      required:
+        - power-domains
+
+additionalProperties: false
 
 examples:
   - |