dt-bindings: usb: qcom,dwc3: Add bindings for SC7280

Add the compatible string for sc7280 SoC from Qualcomm.
Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/1615978901-4202-2-git-send-email-sanm@codeaurora.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

@@ -16,6 +16,7 @@ properties:
           - qcom,msm8996-dwc3
           - qcom,msm8998-dwc3
           - qcom,sc7180-dwc3
+          - qcom,sc7280-dwc3
           - qcom,sdm845-dwc3
           - qcom,sdx55-dwc3
           - qcom,sm8150-dwc3