hwmon: convert drivers/hwmon/* to use module_i2c_driver()

This patch converts the drivers in drivers/hwmon/* to use the
module_i2c_driver() macro which makes the code smaller and a bit simpler.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Corentin Labbe <corentin.labbe@geomatys.fr>
Cc: Dirk Eibach <eibach@gdsys.de>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Steve Glendinning <steve.glendinning@smsc.com>
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Guillaume Ligneul <guillaume.ligneul@gmail.com>
Cc: David George <david.george@ska.ac.za>
Cc: "Hans J. Koch" <hjk@hansjkoch.de>
Cc: Marc Hulsman <m.hulsman@tudelft.nl>
Cc: Rudolf Marek <r.marek@assembler.cz>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
diff --git a/drivers/hwmon/pmbus/zl6100.c b/drivers/hwmon/pmbus/zl6100.c
index e3e8420..8ae6581 100644
--- a/drivers/hwmon/pmbus/zl6100.c
+++ b/drivers/hwmon/pmbus/zl6100.c
@@ -264,18 +264,8 @@
 	.id_table = zl6100_id,
 };
 
-static int __init zl6100_init(void)
-{
-	return i2c_add_driver(&zl6100_driver);
-}
-
-static void __exit zl6100_exit(void)
-{
-	i2c_del_driver(&zl6100_driver);
-}
+module_i2c_driver(zl6100_driver);
 
 MODULE_AUTHOR("Guenter Roeck");
 MODULE_DESCRIPTION("PMBus driver for ZL6100 and compatibles");
 MODULE_LICENSE("GPL");
-module_init(zl6100_init);
-module_exit(zl6100_exit);