m68k: dts: add watchdog node

Add watchdog node for the implemented mcf_wdt driver.

Signed-off-by: Angelo Dureghello <angelo@kernel-space.org>
---
Changes for v2:
- remove unnecessary big-endian property
Changes for v3:
- none
diff --git a/arch/m68k/dts/M5208EVBE.dts b/arch/m68k/dts/M5208EVBE.dts
index 1c32718..ec203e8 100644
--- a/arch/m68k/dts/M5208EVBE.dts
+++ b/arch/m68k/dts/M5208EVBE.dts
@@ -15,6 +15,11 @@
 	};
 };
 
+&wdog0 {
+	timeout-sec = <32>;
+	status = "okay";
+};
+
 &uart0 {
 	bootph-all;
 	status = "okay";