dt-bindings: PCI: xilinx-xdma: Add schemas for Xilinx QDMA PCIe Root Port Bridge

Add YAML devicetree schemas for Xilinx QDMA Soft IP PCIe Root Port
Bridge version 3.0.

Link: https://lore.kernel.org/linux-pci/20240811022345.1178203-2-thippesw@amd.com
Signed-off-by: Thippeswamy Havalige <thippesw@amd.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>

Documentation/devicetree/bindings/pci/xlnx,xdma-host.yaml

@@ -14,10 +14,21 @@ allOf:
 
 properties:
   compatible:
-    const: xlnx,xdma-host-3.00
+    enum:
+      - xlnx,xdma-host-3.00
+      - xlnx,qdma-host-3.00
 
   reg:
-    maxItems: 1
+    items:
+      - description: configuration region and XDMA bridge register.
+      - description: QDMA bridge register.
+    minItems: 1
+
+  reg-names:
+    items:
+      - const: cfg
+      - const: breg
+    minItems: 1
 
   ranges:
     maxItems: 2
@@ -76,6 +87,27 @@ required:
   - "#interrupt-cells"
   - interrupt-controller
 
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - xlnx,qdma-host-3.00
+then:
+  properties:
+    reg:
+      minItems: 2
+    reg-names:
+      minItems: 2
+  required:
+    - reg-names
+else:
+  properties:
+    reg:
+      maxItems: 1
+    reg-names:
+      maxItems: 1
+
 unevaluatedProperties: false
 
 examples: