dt-bindings: PCI: qcom: Document the IPQ5424 PCIe controller

Document the PCIe controller on the IPQ5424 platform using the
IPQ9574 bindings as a fallback, since the PCIe on the IPQ5424
is similar to IPQ9574.

Link: https://lore.kernel.org/r/20241213134950.234946-2-quic_mmanikan@quicinc.com
Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@quicinc.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Author: Manikanta Mylavarapu

Documentation/devicetree/bindings/pci/qcom,pcie.yaml

@@ -31,6 +31,10 @@ properties:
           - qcom,pcie-qcs404
           - qcom,pcie-sdm845
           - qcom,pcie-sdx55
+      - items:
+          - enum:
+              - qcom,pcie-ipq5424
+          - const: qcom,pcie-ipq9574
       - items:
           - const: qcom,pcie-msm8998
           - const: qcom,pcie-msm8996