watchdog: convert drivers/watchdog/* to use module_platform_driver_probe

This makes the code a bit smaller by getting rid of
some boilerplate code.

Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/watchdog/txx9wdt.c

@@ -172,18 +172,7 @@ static struct platform_driver txx9wdt_driver = {
 	},
 };
 
-static int __init watchdog_init(void)
-{
-	return platform_driver_probe(&txx9wdt_driver, txx9wdt_probe);
-}
-
-static void __exit watchdog_exit(void)
-{
-	platform_driver_unregister(&txx9wdt_driver);
-}
-
-module_init(watchdog_init);
-module_exit(watchdog_exit);
+module_platform_driver_probe(txx9wdt_driver, txx9wdt_probe);
 
 MODULE_DESCRIPTION("TXx9 Watchdog Driver");
 MODULE_LICENSE("GPL");