ARM: dts: msm: Add device bindings for RPM stats for sdm670

RPM stats exports counters that indicates the number of times,
deeper low power modes were achieved.

Change-Id: I928281f19633229d57d8d9548d0ea320a9312f26
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
diff --git a/arch/arm64/boot/dts/qcom/sdm670-pm.dtsi b/arch/arm64/boot/dts/qcom/sdm670-pm.dtsi
index ee17ebf..8501d80 100644
--- a/arch/arm64/boot/dts/qcom/sdm670-pm.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm670-pm.dtsi
@@ -189,4 +189,10 @@
 			};
 		};
 	};
+
+	qcom,rpm-stats@c300000 {
+		compatible = "qcom,rpm-stats";
+		reg = <0xc300000 0x1000>, <0xc3f0004 0x4>;
+		reg-names = "phys_addr_base", "offset_addr";
+	};
 };