dt-bindings: usb: qcom,dwc3: Add bindings for SA8775P

Add the compatible string for SA8775P SoC from Qualcomm.

Signed-off-by: Shazad Hussain <quic_shazhuss@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230428130824.23803-2-quic_shazhuss@quicinc.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/usb/qcom,dwc3.yaml

@@ -23,6 +23,7 @@ properties:
           - qcom,msm8998-dwc3
           - qcom,qcm2290-dwc3
           - qcom,qcs404-dwc3
+          - qcom,sa8775p-dwc3
           - qcom,sc7180-dwc3
           - qcom,sc7280-dwc3
           - qcom,sc8280xp-dwc3
@@ -180,6 +181,7 @@ allOf:
               - qcom,msm8953-dwc3
               - qcom,msm8996-dwc3
               - qcom,msm8998-dwc3
+              - qcom,sa8775p-dwc3
               - qcom,sc7180-dwc3
               - qcom,sc7280-dwc3
               - qcom,sdm670-dwc3
@@ -455,6 +457,25 @@ allOf:
             - const: dm_hs_phy_irq
             - const: ss_phy_irq
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sa8775p-dwc3
+    then:
+      properties:
+        interrupts:
+          minItems: 3
+          maxItems: 4
+        interrupt-names:
+          minItems: 3
+          items:
+            - const: pwr_event
+            - const: dp_hs_phy_irq
+            - const: dm_hs_phy_irq
+            - const: ss_phy_irq
+
 additionalProperties: false
 
 examples: