dt-bindings: thermal: amlogic,thermal: add optional power-domains

On newer SoCs, the thermal hardware can require a power domain to
operate so add corresponding optional property.
Signed-off-by: George Stark <gnstark@salutedevices.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240710223214.2348418-3-gnstark@salutedevices.comSigned-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Documentation/devicetree/bindings/thermal/amlogic,thermal.yaml

@@ -32,6 +32,9 @@ properties:
   clocks:
     maxItems: 1
 
+  power-domains:
+    maxItems: 1
+
   amlogic,ao-secure:
     description: phandle to the ao-secure syscon
     $ref: /schemas/types.yaml#/definitions/phandle