dt-bindings: PCI: qcom-ep: Add SAR2130P compatible

Add support for using the PCI controller in the PCIe Endpoint mode on
the SAR2130P platform.

This is needed, as it is not possible to use a compatible fallback on
any other platform since SAR2130P uses slightly different set of clocks.

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250221-sar2130p-pci-v3-5-61a0fdfb75b4@linaro.org
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>

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

@@ -14,6 +14,7 @@ properties:
     oneOf:
       - enum:
           - qcom,sa8775p-pcie-ep
+          - qcom,sar2130p-pcie-ep
           - qcom,sdx55-pcie-ep
           - qcom,sm8450-pcie-ep
       - items:
@@ -44,11 +45,11 @@ properties:
 
   clocks:
     minItems: 5
-    maxItems: 8
+    maxItems: 9
 
   clock-names:
     minItems: 5
-    maxItems: 8
+    maxItems: 9
 
   qcom,perst-regs:
     description: Reference to a syscon representing TCSR followed by the two
@@ -132,6 +133,37 @@ required:
 allOf:
   - $ref: pci-ep.yaml#
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sar2130p-pcie-ep
+    then:
+      properties:
+        clocks:
+          items:
+            - description: PCIe Auxiliary clock
+            - description: PCIe CFG AHB clock
+            - description: PCIe Master AXI clock
+            - description: PCIe Slave AXI clock
+            - description: PCIe Slave Q2A AXI clock
+            - description: PCIe DDRSS SF TBU clock
+            - description: PCIe AGGRE NOC AXI clock
+            - description: PCIe CFG NOC AXI clock
+            - description: PCIe QMIP AHB clock
+        clock-names:
+          items:
+            - const: aux
+            - const: cfg
+            - const: bus_master
+            - const: bus_slave
+            - const: slave_q2a
+            - const: ddrss_sf_tbu
+            - const: aggre_noc_axi
+            - const: cnoc_sf_axi
+            - const: qmip_pcie_ahb
+
   - if:
       properties:
         compatible: