ARM: STi: STiH407: Enable Cortex-A9 PMU support

This is ARM's generic Performance Monitoring Unit.
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NMaxime Coquelin <maxime.coquelin@st.com>

arch/arm/boot/dts/stih407-family.dtsi

@@ -58,6 +58,12 @@
 		cache-level = <2>;
 	};
 
+	arm-pmu {
+		interrupt-parent = <&intc>;
+		compatible = "arm,cortex-a9-pmu";
+		interrupts = <GIC_PPI 15 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
 	soc {
 		#address-cells = <1>;
 		#size-cells = <1>;