arm64: dts: Add ARM PMUv3 DT node in NS2 DT

The NS2 SoC has Cortex-A57 CPUs which support ARM PMUv3 so,
lets enable ARM PMUv3 in NS2 DT.

Signed-off-by: Anup Patel <anup.patel@broadcom.com>
Reviewed-by: Vikram Prakash <vikramp@broadcom.com>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm64/boot/dts/broadcom/ns2.dtsi

@@ -44,7 +44,7 @@
 		#address-cells = <2>;
 		#size-cells = <0>;
 
-		cpu@0 {
+		A57_0: cpu@0 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a57", "arm,armv8";
 			reg = <0 0>;
@@ -53,7 +53,7 @@
 			next-level-cache = <&CLUSTER0_L2>;
 		};
 
-		cpu@1 {
+		A57_1: cpu@1 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a57", "arm,armv8";
 			reg = <0 1>;
@@ -62,7 +62,7 @@
 			next-level-cache = <&CLUSTER0_L2>;
 		};
 
-		cpu@2 {
+		A57_2: cpu@2 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a57", "arm,armv8";
 			reg = <0 2>;
@@ -71,7 +71,7 @@
 			next-level-cache = <&CLUSTER0_L2>;
 		};
 
-		cpu@3 {
+		A57_3: cpu@3 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a57", "arm,armv8";
 			reg = <0 3>;
@@ -97,6 +97,18 @@
 			      IRQ_TYPE_EDGE_RISING)>;
 	};
 
+	pmu {
+		compatible = "arm,armv8-pmuv3";
+		interrupts = <GIC_SPI 168 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 169 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 170 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 171 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-affinity = <&A57_0>,
+				     <&A57_1>,
+				     <&A57_2>,
+				     <&A57_3>;
+	};
+
 	soc: soc {
 		compatible = "simple-bus";
 		#address-cells = <1>;