ARM: shmobile: r8a7740: add PMU information to r8a7740.dtsi

Add PMU information to r8a7740.dtsi. With this
included Armadillo800eva DT reference may use the PMU.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7740.dtsi

@@ -32,6 +32,11 @@
 		      <0xc2000000 0x1000>;
 	};
 
+	pmu {
+		compatible = "arm,cortex-a9-pmu";
+		interrupts = <0 83 4>;
+	};
+
 	/* irqpin0: IRQ0 - IRQ7 */
 	irqpin0: irqpin@e6900000 {
 		compatible = "renesas,intc-irqpin";