arm64: dts: qcom: sc8280xp: add rpmh-stats node

Add a node describing the RPMh shared memory that can be used to
retrieve statistics for the SoC low-power modes.
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220921080050.21383-1-johan+linaro@kernel.org

arch/arm64/boot/dts/qcom/sc8280xp.dtsi

@@ -1476,6 +1476,11 @@ aoss_qmp: power-controller@c300000 {
 			#clock-cells = <0>;
 		};
 
+		sram@c3f0000 {
+			compatible = "qcom,rpmh-stats";
+			reg = <0 0x0c3f0000 0 0x400>;
+		};
+
 		spmi_bus: spmi@c440000 {
 			compatible = "qcom,spmi-pmic-arb";
 			reg = <0 0x0c440000 0 0x1100>,