dt-bindings: phy: qcom,qmp: Add SM8450 PCIe PHY bindings

There are two different PCIe PHYs on SM8450, one having one lane and
another with two lanes. Add support for second (gen4, two lanes) PHY.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211218141754.503661-2-dmitry.baryshkov@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/qcom,qmp-phy.yaml

@@ -51,6 +51,7 @@ properties:
       - qcom,sm8350-qmp-usb3-phy
       - qcom,sm8350-qmp-usb3-uni-phy
       - qcom,sm8450-qmp-gen3x1-pcie-phy
+      - qcom,sm8450-qmp-gen4x2-pcie-phy
       - qcom,sm8450-qmp-ufs-phy
       - qcom,sm8450-qmp-usb3-phy
       - qcom,sdx55-qmp-pcie-phy
@@ -336,6 +337,7 @@ allOf:
               - qcom,sm8250-qmp-gen3x2-pcie-phy
               - qcom,sm8250-qmp-modem-pcie-phy
               - qcom,sm8450-qmp-gen3x1-pcie-phy
+              - qcom,sm8450-qmp-gen4x2-pcie-phy
     then:
       properties:
         clocks: