ARM: dts: rockchip: Enable Cortex-A12 HW PMU events on rk3288

This adds the dts node for the PMU with the correct PMUIRQ interrupts
for each core.
Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3288.dtsi

@@ -44,6 +44,14 @@ aliases {
 		spi2 = &spi2;
 	};
 
+	arm-pmu {
+		compatible = "arm,cortex-a12-pmu";
+		interrupts = <GIC_SPI 151 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 152 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;