charge-animation
~~~~~~~~~~~~~~~~

Required properties :
 - compatible: "rockchip,uboot-charge"
 - rockchip,uboot-charge-on: enable uboot charge animation
 - rockchip,android-charge-on: enable android charge animation,
	either uboot charge animation or android charge animation
	can be executed, but not both

Optional properties :
 - rockchip,uboot-low-power-voltage: voltage threshold of power off
 - rockchip,screen-on-voltage: voltage threshold of screen on

Example:

	charge-animation {
		compatible = "rockchip,uboot-charge";
		rockchip,uboot-charge-on = <1>;
		rockchip,android-charge-on = <0>;
		rockchip,uboot-low-power-voltage = <3500>;
		rockchip,screen-on-voltage = <3600>;
		status = "okay";
	};