ARM: n900_defconfig: compile watchdog drivers in kernel

This should prevent occasional shut downs on slow booting.

Device Drivers  --->
  Watchdog Timer Support  --->
   <*> OMAP Watchdog     [CONFIG_OMAP_WATCHDOG]
   <*> TWL4030 Watchdog  [CONFIG_TWL4030_WATCHDOG]

arch/arm/configs/n900_defconfig

@@ -284,8 +284,8 @@ CONFIG_THERMAL_GOV_USER_SPACE=y
 CONFIG_CPU_THERMAL=y
 CONFIG_TI_THERMAL=y
 CONFIG_WATCHDOG=y
-CONFIG_OMAP_WATCHDOG=m
-CONFIG_TWL4030_WATCHDOG=m
+CONFIG_OMAP_WATCHDOG=y
+CONFIG_TWL4030_WATCHDOG=y
 CONFIG_MFD_CPCAP=y
 CONFIG_MFD_TI_AM335X_TSCADC=m
 CONFIG_MFD_TI_LMU=m