backlight: convert backlight spi drivers to module_spi_driver

Factor out some boilerplate code for spi driver registration into
module_spi_driver.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Cc: Eric Miao <eric.y.miao@gmail.com>
Acked-by: Alberto Panizzo <alberto@amarulasolutions.com>
Cc: Donghwa Lee <dh09.lee@samsung.com>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: InKi Dae <inki.dae@samsung.com>
Cc: Dmitry Baryshkov <dbaryshkov@gmail.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/video/backlight/lms283gf05.c b/drivers/video/backlight/lms283gf05.c
index 4ec78cf..4161f9e 100644
--- a/drivers/video/backlight/lms283gf05.c
+++ b/drivers/video/backlight/lms283gf05.c
@@ -226,18 +226,7 @@
 	.remove		= __devexit_p(lms283gf05_remove),
 };
 
-static __init int lms283gf05_init(void)
-{
-	return spi_register_driver(&lms283gf05_driver);
-}
-
-static __exit void lms283gf05_exit(void)
-{
-	spi_unregister_driver(&lms283gf05_driver);
-}
-
-module_init(lms283gf05_init);
-module_exit(lms283gf05_exit);
+module_spi_driver(lms283gf05_driver);
 
 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 MODULE_DESCRIPTION("LCD283GF05 LCD");