ARM: mvebu: Enable Armada 375 watchdog in the devicetree

Add the DT nodes to enable the watchdog support available on
Armada 375 SoC.

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Link: https://lkml.kernel.org/r/1397481813-4962-8-git-send-email-ezequiel.garcia@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/armada-375.dtsi

@@ -320,6 +320,12 @@
 				clocks = <&coreclk 0>;
 			};
 
+			watchdog@20300 {
+				compatible = "marvell,armada-375-wdt";
+				reg = <0x20300 0x34>, <0x20704 0x4>, <0x18254 0x4>;
+				clocks = <&coreclk 0>;
+			};
+
 			xor@60800 {
 				compatible = "marvell,orion-xor";
 				reg = <0x60800 0x100