PM / Domains: Fix DT example

The power-domain provider's #power-domain-cells field is set to 0 and
yet the children is using an index to point the power domain. Fix it by
removing the index field.

Fixes: 70bb510 (dt/bindings / PM/Domains: Update binding for PM domain idle states)
Signed-off-by: Viresh Kumar <[email protected]>
Acked-by: Ulf Hansson <[email protected]>
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>

Author: vireshk

Documentation/devicetree/bindings/power/power_domain.txt

@@ -81,7 +81,7 @@ Example 3:
 	child: power-controller@12341000 {
 		compatible = "foo,power-controller";
 		reg = <0x12341000 0x1000>;
-		power-domains = <&parent 0>;
+		power-domains = <&parent>;
 		#power-domain-cells = <0>;
 		domain-idle-states = <&DOMAIN_PWR_DN>;
 	};