dt-bindings: phy: qcom,qmp: add IPQ8074 PCIe Gen3 PHY binding

IPQ8074 has 2 different single lane PCIe PHY-s, one Gen2 and one Gen3.
Gen2 one is already supported, document the bindings for the Gen3 one.
Signed-off-by: Robert Marko <robimarko@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220621195512.1760362-2-robimarko@gmail.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

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

@@ -19,6 +19,7 @@ properties:
     enum:
       - qcom,ipq6018-qmp-pcie-phy
       - qcom,ipq6018-qmp-usb3-phy
+      - qcom,ipq8074-qmp-gen3-pcie-phy
       - qcom,ipq8074-qmp-pcie-phy
       - qcom,ipq8074-qmp-usb3-phy
       - qcom,msm8996-qmp-pcie-phy
@@ -312,6 +313,7 @@ allOf:
           contains:
             enum:
               - qcom,ipq6018-qmp-pcie-phy
+              - qcom,ipq8074-qmp-gen3-pcie-phy
               - qcom,ipq8074-qmp-pcie-phy
     then:
       properties: