watchdog: Use DEFINE_SPINLOCK() for static spinlocks

Rather than just defining static spinlock_t variables and then
initializing them later in init functions, simply define them with
DEFINE_SPINLOCK() and remove the calls to spin_lock_init().

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Nicolas Thill <nico@openwrt.org>
Cc: Heiko Ronsdorf <hero@ihg.uni-duisburg.de>
Cc: Rodolfo Giometti <giometti@ascensit.com>
Cc: Andrey Panin <pazke@donpac.ru>
Cc: Guido Guenther <agx@sigxcpu.org>
Cc: Curt E Bruns <curt.e.bruns@intel.com>
Cc: Deepak Saxena <dsaxena@plexity.net>
Cc: Andrew Victor <linux@maxim.org.za>
Cc: George G. Davis <gdavis@mvista.com>
Cc: Sylver Bruneau <sylver.bruneau@googlemail.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
diff --git a/drivers/watchdog/ar7_wdt.c b/drivers/watchdog/ar7_wdt.c
index b292217..b9564c5 100644
--- a/drivers/watchdog/ar7_wdt.c
+++ b/drivers/watchdog/ar7_wdt.c
@@ -70,8 +70,8 @@
 };
 
 static unsigned long wdt_is_open;
-static spinlock_t wdt_lock;
 static unsigned expect_close;
+static DEFINE_SPINLOCK(wdt_lock);
 
 /* XXX currently fixed, allows max margin ~68.72 secs */
 #define prescale_value 0xffff
@@ -280,8 +280,6 @@
 {
 	int rc;
 
-	spin_lock_init(&wdt_lock);
-
 	ar7_regs_wdt =
 		platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
 	if (!ar7_regs_wdt) {