ARM: multi_v7_defconfig: Enable BCM7038 Watchdog

The BCM7038 watchdog is used by all Broadcom STB SoCs but is not needed
for system reboot, we just turn it on as a module.
Acked-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/configs/multi_v7_defconfig

@@ -457,6 +457,7 @@ CONFIG_MESON_WATCHDOG=y
 CONFIG_DW_WATCHDOG=y
 CONFIG_DIGICOLOR_WATCHDOG=y
 CONFIG_BCM2835_WDT=y
+CONFIG_BCM7038_WDT=m
 CONFIG_MFD_AS3711=y
 CONFIG_MFD_AS3722=y
 CONFIG_MFD_ATMEL_FLEXCOM=y