dt-bindings: PCI: Add EP mode dt-bindings for TI's J7200 SoC

Add PCIe EP mode dt-bindings for TI's J7200 SoC.

Link: https://lore.kernel.org/r/20201210124917.24185-4-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/pci/ti,j721e-pci-ep.yaml

@@ -15,8 +15,14 @@ allOf:
 
 properties:
   compatible:
-    enum:
-      - ti,j721e-pcie-ep
+    oneOf:
+      - description: PCIe EP controller in J7200
+        items:
+          - const: ti,j7200-pcie-ep
+          - const: ti,j721e-pcie-ep
+      - description: PCIe EP controller in J721E
+        items:
+          - const: ti,j721e-pcie-ep
 
   reg:
     maxItems: 4