arm64: dts: qcom: msm8992: Add PMU node

Add the PMU so we can get proper perf event support on this SoC.
Signed-off-by: Konrad Dybcio <konradybcio@gmail.com>
Link: https://lore.kernel.org/r/20200625182118.131476-10-konradybcio@gmail.comSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8992.dtsi

@@ -130,6 +130,11 @@ memory {
 		reg = <0 0 0 0>;
 	};
 
+	pmu {
+		compatible = "arm,cortex-a53-pmu";
+		interrupts = <GIC_PPI 7 (GIC_CPU_MASK_SIMPLE(4)| IRQ_TYPE_LEVEL_HIGH)>;
+	};
+
 	reserved-memory {
 		#address-cells = <2>;
 		#size-cells = <2>;