ARM: mvebu: Enable Armada 370/XP watchdog in the devicetree

Add the DT nodes to enable watchdog support available in Armada 370
and Armada XP SoCs.

Tested-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
diff --git a/arch/arm/boot/dts/armada-xp.dtsi b/arch/arm/boot/dts/armada-xp.dtsi
index b8b84a2..abb9f9d 100644
--- a/arch/arm/boot/dts/armada-xp.dtsi
+++ b/arch/arm/boot/dts/armada-xp.dtsi
@@ -111,6 +111,12 @@
 				clock-names = "nbclk", "fixed";
 			};
 
+			watchdog@20300 {
+				compatible = "marvell,armada-xp-wdt";
+				clocks = <&coreclk 2>, <&refclk>;
+				clock-names = "nbclk", "fixed";
+			};
+
 			armada-370-xp-pmsu@22000 {
 				compatible = "marvell,armada-370-xp-pmsu";
 				reg = <0x22100 0x400>, <0x20800 0x20>;