dt-bindings: phy: qcom,sc8280xp-qmp-usb3-uni: Add SA8775P USB PHY binding

Add compatible string for Qualcomm QMP Super Speed (SS) UNI PHY found
in SA8775P.

Signed-off-by: Shazad Hussain <[e-mail]>
Acked-by: Rob Herring <[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

···
 properties:
   compatible:
     enum:
+      - qcom,sa8775p-qmp-usb3-uni-phy
       - qcom,sc8280xp-qmp-usb3-uni-phy
 
   reg: