dt-bindings: soc: qcom: Update devicetree binding document for rpmh-rsc

The change documents power-domains property for RSC device.
This optional property points to corresponding PM domain node.

Signed-off-by: Maulik Shah <quic_mkshah@quicinc.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> # SM8450
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221018152837.619426-2-ulf.hansson@linaro.org

Documentation/devicetree/bindings/soc/qcom/qcom,rpmh-rsc.yaml

@@ -99,6 +99,9 @@ properties:
       - const: drv-2
       - const: drv-3
 
+  power-domains:
+    maxItems: 1
+
   bcm-voter:
     $ref: /schemas/interconnect/qcom,bcm-voter.yaml#
 
@@ -151,6 +154,7 @@ examples:
                           <SLEEP_TCS   3>,
                           <WAKE_TCS    3>,
                           <CONTROL_TCS 1>;
+        power-domains = <&CLUSTER_PD>;
       };
 
   - |
@@ -197,6 +201,7 @@ examples:
                           <SLEEP_TCS   3>,
                           <WAKE_TCS    3>,
                           <CONTROL_TCS 0>;
+        power-domains = <&CLUSTER_PD>;
 
         clock-controller {
             compatible = "qcom,sm8350-rpmh-clk";