dt-bindings: PCI: dwc: improve msi handling

Allow missing "msi" interrupt, iff the node has a "msi-map" property.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20230731165723.53069-2-sebastian.reichel@collabora.com
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml

@@ -25,6 +25,15 @@ select:
 allOf:
   - $ref: /schemas/pci/pci-bus.yaml#
   - $ref: /schemas/pci/snps,dw-pcie-common.yaml#
+  - if:
+      not:
+        required:
+          - msi-map
+    then:
+      properties:
+        interrupt-names:
+          contains:
+            const: msi
 
 properties:
   reg:
@@ -193,9 +202,6 @@ properties:
           oneOf:
             - description: See native "app" IRQ for details
               enum: [ intr ]
-    allOf:
-      - contains:
-          const: msi
 
 additionalProperties: true