dt-bindings: PCI: qcom: Add SA8540P to binding

SA8540P is a new platform related to SC8280XP but which uses a single
host interrupt for MSI routing.

Link: https://lore.kernel.org/r/20220714071348.6792-4-johan+linaro@kernel.orgSigned-off-by: NJohan Hovold <johan+linaro@kernel.org>
Signed-off-by: NLorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: NBrian Masney <bmasney@redhat.com>
Acked-by: NKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: NStanimir Varbanov <svarbanov@mm-sol.com>

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

@@ -25,6 +25,7 @@ properties:
       - qcom,pcie-ipq4019
       - qcom,pcie-ipq8074
       - qcom,pcie-qcs404
+      - qcom,pcie-sa8540p
       - qcom,pcie-sc7280
       - qcom,pcie-sc8180x
       - qcom,pcie-sc8280xp
@@ -603,6 +604,7 @@ allOf:
         compatible:
           contains:
             enum:
+              - qcom,pcie-sa8540p
               - qcom,pcie-sc8280xp
     then:
       properties:
@@ -721,6 +723,7 @@ allOf:
               - qcom,pcie-ipq8064-v2
               - qcom,pcie-ipq8074
               - qcom,pcie-qcs404
+              - qcom,pcie-sa8540p
     then:
       properties:
         interrupts: