ARM: at91/defconfig: enable watchdog drivers in sama5_defconfig

Enable AT91SAM9X and SAMA5D4 watchdog drivers.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/configs/sama5_defconfig

@@ -129,6 +129,9 @@ CONFIG_GPIO_SYSFS=y
 CONFIG_POWER_SUPPLY=y
 CONFIG_POWER_RESET=y
 # CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+CONFIG_AT91SAM9X_WATCHDOG=y
+CONFIG_SAMA5D4_WATCHDOG=y
 CONFIG_MFD_ATMEL_FLEXCOM=y
 CONFIG_REGULATOR=y
 CONFIG_REGULATOR_FIXED_VOLTAGE=y