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/mcf537x.dtsi b/arch/m68k/dts/mcf537x.dtsi
index 338b8b4..4fa0f4b 100644
--- a/arch/m68k/dts/mcf537x.dtsi
+++ b/arch/m68k/dts/mcf537x.dtsi
@@ -16,6 +16,12 @@
 		#address-cells = <1>;
 		#size-cells = <1>;
 
+		wdog0: watchdog@fc098000 {
+			compatible = "fsl,mcf5208-wdt";
+			reg = <0xfc08c000 0x10>;
+			status = "disabled";
+		};
+
 		uart0: uart@fc060000 {
 			compatible = "fsl,mcf-uart";
 			reg = <0xfc060000 0x40>;