power_supply: Convert 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: Woogyom Kim <milo.kim@ti.com>
Cc: Daniel Jeong <daniel.jeong@ti.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Peter Edwards <sweetlilmre@gmail.com>
Acked-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Acked-by: Rhyland Klein <rklein@nvidia.com>
Acked-by: Ryan Mallon <rmallon@gmail.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
diff --git a/drivers/power/sbs-battery.c b/drivers/power/sbs-battery.c
index 9ff8af0..06b659d 100644
--- a/drivers/power/sbs-battery.c
+++ b/drivers/power/sbs-battery.c
@@ -852,18 +852,7 @@
 		.of_match_table = sbs_dt_ids,
 	},
 };
-
-static int __init sbs_battery_init(void)
-{
-	return i2c_add_driver(&sbs_battery_driver);
-}
-module_init(sbs_battery_init);
-
-static void __exit sbs_battery_exit(void)
-{
-	i2c_del_driver(&sbs_battery_driver);
-}
-module_exit(sbs_battery_exit);
+module_i2c_driver(sbs_battery_driver);
 
 MODULE_DESCRIPTION("SBS battery monitor driver");
 MODULE_LICENSE("GPL");