ARM: dts: am33xx: cpus/cpu nodes dts updates

This patch updates the in-kernel dts files according to the latest cpus
and cpu bindings updates for ARM.
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

arch/arm/boot/dts/am33xx.dtsi

@@ -26,8 +26,12 @@ aliases {
 	};
 
 	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
 		cpu@0 {
 			compatible = "arm,cortex-a8";
+			device_type = "cpu";
+			reg = <0>;
 
 			/*
 			 * To consider voltage drop between PMIC and SoC,