ARM: dts: berlin: add pmu node for BG2Q and BG2CD

This patch adds the pmu node, enabling the PMU unit on Marvell BG2Q and
BG2CD SoCs.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
diff --git a/arch/arm/boot/dts/berlin2cd.dtsi b/arch/arm/boot/dts/berlin2cd.dtsi
index 230df3b..a318bc3 100644
--- a/arch/arm/boot/dts/berlin2cd.dtsi
+++ b/arch/arm/boot/dts/berlin2cd.dtsi
@@ -45,6 +45,11 @@
 
 		ranges = <0 0xf7000000 0x1000000>;
 
+		pmu {
+			compatible = "arm,cortex-a9-pmu";
+			interrupts = <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
 		sdhci0: sdhci@ab0000 {
 			compatible = "mrvl,pxav3-mmc";
 			reg = <0xab0000 0x200>;