bfin_wdt, remove SPIN_LOCK_UNLOCKED

SPIN_LOCK_UNLOCKED is deprecated, use DEFINE_SPINLOCK instead
Signed-off-by: NJiri Slaby <jirislaby@gmail.com>
Acked-by: NMike Frysinger <vapier.adi@gmail.com>
Cc: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>