arm64: dts: mt8173: add pmu nodes for mt8173

This patch adds the device nodes of ARM Performance Monitor Uint
for mt8173.
Signed-off-by: Seiya Wang <seiya.wang@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt8173.dtsi

@@ -216,6 +216,20 @@ CPU_SLEEP_0: cpu-sleep-0 {
 		};
 	};
 
+	pmu_a53 {
+		compatible = "arm,cortex-a53-pmu";
+		interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_SPI 9 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-affinity = <&cpu0>, <&cpu1>;
+	};
+
+	pmu_a72 {
+		compatible = "arm,cortex-a72-pmu";
+		interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_SPI 13 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-affinity = <&cpu2>, <&cpu3>;
+	};
+
 	psci {
 		compatible = "arm,psci-1.0", "arm,psci-0.2", "arm,psci";
 		method = "smc";