configs: m68k: add watchdog driver

Add config options for mcf_wdt driver.

Signed-off-by: Angelo Dureghello <angelo@kernel-space.org>
---
Changes for v2:
- none
Changes for v3:
- none
diff --git a/configs/eb_cpu5282_internal_defconfig b/configs/eb_cpu5282_internal_defconfig
index 44e22eb..bd78003 100644
--- a/configs/eb_cpu5282_internal_defconfig
+++ b/configs/eb_cpu5282_internal_defconfig
@@ -50,3 +50,4 @@
 CONFIG_DM_RTC=y
 CONFIG_RTC_DS1338=y
 CONFIG_MCFUART=y
+CONFIG_WDT=y