ARM: dts: NSP: Add PMU Support to DT

Add support for the ARM Performance Monitor Unit to the Northstar Plus
device tree.
Signed-off-by: Jon Mason <jonmason@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/boot/dts/bcm-nsp.dtsi

@@ -45,14 +45,14 @@ cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
 
-		cpu@0 {
+		cpu0: cpu@0 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a9";
 			next-level-cache = <&L2>;
 			reg = <0x0>;
 		};
 
-		cpu@1 {
+		cpu1: cpu@1 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a9";
 			next-level-cache = <&L2>;
@@ -62,6 +62,13 @@ cpu@1 {
 		};
 	};
 
+	pmu {
+		compatible = "arm,cortex-a9-pmu";
+		interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH
+			      GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-affinity = <&cpu0>, <&cpu1>;
+	};
+
 	mpcore {
 		compatible = "simple-bus";
 		ranges = <0x00000000 0x19000000 0x00023000>;