* Mvebu Real Time Clock

RTC controller for the Kirkwood, the Dove, the Armada 370 and the
Armada XP SoCs

Required properties:
- compatible : Should be "marvell,orion-rtc"
- reg: physical base address of the controller and length of memory mapped
  region.
- interrupts: IRQ line for the RTC.

Example:

rtc@10300 {
        compatible = "marvell,orion-rtc";
        reg = <0xd0010300 0x20>;
        interrupts = <50>;
};