arm64: dts: mediatek: mt6795: Add Cortex A53 PMU nodes

Add the required nodes to enable the PMU on this SoC.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220609112303.117928-4-angelogioacchino.delregno@collabora.comSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt6795.dtsi

@@ -160,6 +160,15 @@ uart_clk: dummy26m {
 		#clock-cells = <0>;
 	};
 
+	pmu {
+		compatible = "arm,cortex-a53-pmu";
+		interrupts = <GIC_SPI  8 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_SPI  9 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_SPI 10 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_SPI 11 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-affinity = <&cpu0>, <&cpu1>, <&cpu2>, <&cpu3>;
+	};
+
 	timer {
 		compatible = "arm,armv8-timer";
 		interrupt-parent = <&gic>;