watchdog: da9055_wdt needs to select WATCHDOG_CORE
watchdog: da9055_wdt needs to select WATCHDOG_CORE

DA9055_WATCHDOG (introduced in v3.8) needs to select WATCHDOG_CORE so that it will
build cleanly.  Fixes these build errors:

da9055_wdt.c:(.text+0xe9bc7): undefined reference to `watchdog_unregister_device'
da9055_wdt.c:(.text+0xe9f4b): undefined reference to `watchdog_register_device'

Signed-off-by: Randy Dunlap <6f29df8e90a57f1ba61ffd63b0468c86bb6d3a99@infradead.org>
Cc: David Dajun Chen <9cd1f8966427958266f43605c59ea506a219756e@diasemi.com>
Signed-off-by: Wim Van Sebroeck <5f65f6985de1ebf15dde04e0dc4668211868bafa@iguana.be>
Cc: ee6bd6521c0edd0140322317c8db66d3b09bded1@vger.kernel.org
Cc: stable <4fbacc2fa0ffdbb11bf1ad6925b886ebd08dd15f@vger.kernel.org>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas