BCM2835 Watchdog timer

Required properties:

- compatible : should be "brcm,bcm2835-pm-wdt"
- reg : Specifies base physical address and size of the registers.

Optional properties:

- timeout-sec   : Contains the watchdog timeout in seconds

Example:

watchdog {
	compatible = "brcm,bcm2835-pm-wdt";
	reg = <0x7e100000 0x28>;
	timeout-sec = <10>;
};