ARM: Orion: DTify the watchdog timer.

Add device tree support to the Orion watchdog timer, and enable its
use in the kirkwood devices using device tree.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@googlemail.com>
Tested-by: Simon Baatz <gmbnomis@gmail.com>

arch/arm/boot/dts/kirkwood.dtsi

@@ -70,6 +70,12 @@
 			status = "disabled";
 		};
 
+		wdt@20300 {
+			compatible = "marvell,orion-wdt";
+			reg = <0x20300 0x28>;
+			status = "okay";
+		};
+
 		nand@3000000 {
 			#address-cells = <1>;
 			#size-cells = <1>;