arm64: dts: qcom: sm6375: Add RPM sleep stats

Add a node for RPM sleep stats to enable sleep monitoring.
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230303-topic-sm6375_features0_dts-v2-4-708b8191f7eb@linaro.org

arch/arm64/boot/dts/qcom/sm6375.dtsi

@@ -735,6 +735,11 @@ rpm_msg_ram: sram@45f0000 {
 			reg = <0 0x045f0000 0 0x7000>;
 		};
 
+		sram@4690000 {
+			compatible = "qcom,rpm-stats";
+			reg = <0 0x04690000 0 0x400>;
+		};
+
 		sdhc_2: mmc@4784000 {
 			compatible = "qcom,sm6375-sdhci", "qcom,sdhci-msm-v5";
 			reg = <0 0x04784000 0 0x1000>;