dt-bindings: clock: google,gs101-clock: add power-domains

The CMU can be part of a power domain, so we need to allow the relevant
property 'power-domains'.

Signed-off-by: André Draszik <andre.draszik@linaro.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Documentation/devicetree/bindings/clock/google,gs101-clock.yaml

@@ -46,6 +46,9 @@ properties:
   "#clock-cells":
     const: 1
 
+  power-domains:
+    maxItems: 1
+
   reg:
     maxItems: 1