arm64: dts: qcom: sm8250: Rename the qmp node to power-controller

Use the generic DT node name "power-controller" for AOSS message ram
instead of the protocol name QMP(Qualcomm Messaging Protocol) since
it is used for power management requests.
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Suggested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Link: https://lore.kernel.org/r/044fe2e590e166060de65f074df6874ec3a79531.1614669585.git.saiprakash.ranjan@codeaurora.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sm8250.dtsi

@@ -2647,7 +2647,7 @@ tsens1: thermal-sensor@c265000 {
 			#thermal-sensor-cells = <1>;
 		};
 
-		aoss_qmp: qmp@c300000 {
+		aoss_qmp: power-controller@c300000 {
 			compatible = "qcom,sm8250-aoss-qmp";
 			reg = <0 0x0c300000 0 0x100000>;
 			interrupts-extended = <&ipcc IPCC_CLIENT_AOP