dt-bindings: interrupt-controller: fsl,irqsteer: Add imx8mp/imx8qxp support

Some SoC like i.MX8MP or i.MX8QXP use a power-domain for this IP. Add
SoC-specific compatibles, which also requires a power-domain.
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240528071141.92003-2-alexander.stein@ew.tq-group.comSigned-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.yaml

@@ -14,7 +14,10 @@ properties:
     oneOf:
       - const: fsl,imx-irqsteer
       - items:
-          - const: fsl,imx8m-irqsteer
+          - enum:
+              - fsl,imx8m-irqsteer
+              - fsl,imx8mp-irqsteer
+              - fsl,imx8qxp-irqsteer
           - const: fsl,imx-irqsteer
 
   reg:
@@ -42,6 +45,9 @@ properties:
   clock-names:
     const: ipg
 
+  power-domains:
+    maxItems: 1
+
   interrupt-controller: true
 
   "#interrupt-cells":
@@ -70,6 +76,21 @@ required:
   - fsl,channel
   - fsl,num-irqs
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx8mp-irqsteer
+              - fsl,imx8qxp-irqsteer
+    then:
+      required:
+        - power-domains
+    else:
+      properties:
+        power-domains: false
+
 additionalProperties: false
 
 examples: