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 <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring <[e-mail]>

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

···
     description:
       Array of phandles to DMA controllers where the unmapped events originate.
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg