ARM: dts: at91: sama5d2: add PMU node

Add node to support SAMA5D2 Performance Monitor Unit.
Signed-off-by: NOlivier Schonken <olivier.schonken@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

arch/arm/boot/dts/sama5d2.dtsi

@@ -72,6 +72,11 @@
 		};
 	};
 
+	pmu {
+		compatible = "arm,cortex-a5-pmu";
+		interrupts = <2 IRQ_TYPE_LEVEL_HIGH 0>;
+	};
+
 	memory {
 		reg = <0x20000000 0x20000000>;
 	};