Rockchip power-management-unit:
-------------------------------

The pmu is used to turn off and on different power domains of the SoCs
This includes the power to the CPU cores.

Required node properties:
- compatible value : = "rockchip,rk3066-pmu";
- reg : physical base address and the size of the registers window

Example:

	pmu@20004000 {
		compatible = "rockchip,rk3066-pmu";
		reg = <0x20004000 0x100>;
	};