dt-bindings: phy: qcom,sc7180-qmp-usb3-dp-phy: add sm8150 USB+DP PHY

Add bindings for sm8150 USB+DP PHY. These bindings follow the older
style as this is a quick conversion to simplify further driver cleanup.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230531023415.1209301-2-dmitry.baryshkov@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>