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-lp5521.c b/drivers/leds/leds-lp5521.c
index cb641f1..d62a798 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -797,25 +797,7 @@
 	.id_table	= lp5521_id,
 };
 
-static int __init lp5521_init(void)
-{
-	int ret;
-
-	ret = i2c_add_driver(&lp5521_driver);
-
-	if (ret < 0)
-		printk(KERN_ALERT "Adding lp5521 driver failed\n");
-
-	return ret;
-}
-
-static void __exit lp5521_exit(void)
-{
-	i2c_del_driver(&lp5521_driver);
-}
-
-module_init(lp5521_init);
-module_exit(lp5521_exit);
+module_i2c_driver(lp5521_driver);
 
 MODULE_AUTHOR("Mathias Nyman, Yuri Zaporozhets, Samu Onkalo");
 MODULE_DESCRIPTION("LP5521 LED engine");