dt-bindings: usb: qcom,dwc3: Add SM6350 compatible

Add devicetree compatible for dwc3 on SM6350 SoC.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Acked-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211213082614.22651-7-luca.weiss@fairphone.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>