dt-bindings: irqchip: ti,sci-inta: Add optional power-domains property

On certain SoCs, Interrupt Aggregator may have a power-domain dependency
to be on before accessing. Add DT binding for the same
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230407045111.531107-1-vigneshr@ti.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.yaml

@@ -85,6 +85,9 @@ properties:
     description:
       Array of phandles to DMA controllers where the unmapped events originate.
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg