Texas Instruments DaVinci/Keystone Watchdog Timer (WDT) Controller

Required properties:
- compatible : Should be "ti,davinci-wdt", "ti,keystone-wdt"
- reg : Should contain WDT registers location and length

Optional properties:
- timeout-sec : Contains the watchdog timeout in seconds
- clocks : the clock feeding the watchdog timer.
	   Needed if platform uses clocks.
	   See clock-bindings.txt

Documentation:
Davinci DM646x - http://www.ti.com/lit/ug/spruer5b/spruer5b.pdf
Keystone - http://www.ti.com/lit/ug/sprugv5a/sprugv5a.pdf

Examples:

wdt: wdt@2320000 {
	compatible = "ti,davinci-wdt";
	reg = <0x02320000 0x80>;
	timeout-sec = <30>;
	clocks = <&clkwdtimer0>;
};