dt-bindings: interrupt-controller: Allow #power-domain-cells

MPM provides a single genpd. Allow #power-domain-cells = <0>.

Fixes: 54fc985 ("dt-bindings: interrupt-controller: Add Qualcomm MPM support")
Acked-by: Shawn Guo <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Konrad Dybcio <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>

Author: konradybcio

Documentation/devicetree/bindings/interrupt-controller/qcom,mpm.yaml

@@ -62,6 +62,9 @@ properties:
         - description: MPM pin number
         - description: GIC SPI number for the MPM pin
 
+  '#power-domain-cells':
+    const: 0
+
 required:
   - compatible
   - reg
@@ -93,4 +96,5 @@ examples:
                            <86 183>,
                            <90 260>,
                            <91 260>;
+        #power-domain-cells = <0>;
     };