ARM: dts: rockchip: add cpu-supply property for cpu node of rk3229-evb

This patch adds the cpu-supply property so that cpu can do dvfs
on rk3229-evb board.

Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3229-evb.dts

@@ -141,6 +141,22 @@
 	};
 };
 
+&cpu0 {
+	cpu-supply = <&vdd_arm>;
+};
+
+&cpu1 {
+	cpu-supply = <&vdd_arm>;
+};
+
+&cpu2 {
+	cpu-supply = <&vdd_arm>;
+};
+
+&cpu3 {
+	cpu-supply = <&vdd_arm>;
+};
+
 &gmac {
 	assigned-clocks = <&cru SCLK_MAC_EXTCLK>, <&cru SCLK_MAC>;
 	assigned-clock-parents = <&ext_gmac>, <&cru SCLK_MAC_EXTCLK>;