ARM: qcom: msm8974: Add rpm-master-stats node

Add rpm-master-stats node for MSM8974 and the required RPM MSG RAM
slices for memory access.
Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Reviewed-by: Luca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20230922003533.107835-3-matti.lehtimaki@gmail.comSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm/boot/dts/qcom/qcom-msm8974.dtsi

@@ -116,6 +116,18 @@ pmu {
 	rpm: remoteproc {
 		compatible = "qcom,msm8974-rpm-proc", "qcom,rpm-proc";
 
+		master-stats {
+			compatible = "qcom,rpm-master-stats";
+			qcom,rpm-msg-ram = <&apss_master_stats>,
+					   <&mpss_master_stats>,
+					   <&lpss_master_stats>,
+					   <&pronto_master_stats>;
+			qcom,master-names = "APSS",
+					    "MPSS",
+					    "LPSS",
+					    "PRONTO";
+		};
+
 		smd-edge {
 			interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
 			qcom,ipc = <&apcs 8 0>;
@@ -1067,6 +1079,26 @@ gcc: clock-controller@fc400000 {
 		rpm_msg_ram: sram@fc428000 {
 			compatible = "qcom,rpm-msg-ram";
 			reg = <0xfc428000 0x4000>;
+
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0xfc428000 0x4000>;
+
+			apss_master_stats: sram@150 {
+				reg = <0x150 0x14>;
+			};
+
+			mpss_master_stats: sram@b50 {
+				reg = <0xb50 0x14>;
+			};
+
+			lpss_master_stats: sram@1550 {
+				reg = <0x1550 0x14>;
+			};
+
+			pronto_master_stats: sram@1f50 {
+				reg = <0x1f50 0x14>;
+			};
 		};
 
 		bimc: interconnect@fc380000 {