leds: convert led i2c drivers to module_i2c_driver

Factor out some boilerplate code for i2c driver registration
into module_i2c_driver.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Haojian Zhuang <hzhuang1@marvell.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Michael Hennerich <hennerich@blackfin.uclinux.org>
Cc: Mike Rapoport <mike@compulab.co.il>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
index 66aa3e8..dcc3bc3 100644
--- a/drivers/leds/leds-pca955x.c
+++ b/drivers/leds/leds-pca955x.c
@@ -371,18 +371,7 @@
 	.id_table = pca955x_id,
 };
 
-static int __init pca955x_leds_init(void)
-{
-	return i2c_add_driver(&pca955x_driver);
-}
-
-static void __exit pca955x_leds_exit(void)
-{
-	i2c_del_driver(&pca955x_driver);
-}
-
-module_init(pca955x_leds_init);
-module_exit(pca955x_leds_exit);
+module_i2c_driver(pca955x_driver);
 
 MODULE_AUTHOR("Nate Case <ncase@xes-inc.com>");
 MODULE_DESCRIPTION("PCA955x LED driver");