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

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

Cc: Donggeun Kim <dg77.kim@samsung.com>
Cc: Simon Guinot <sguinot@lacie.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Ben Dooks <ben@simtec.co.uk>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: J Keerthy <j-keerthy@ti.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
diff --git a/drivers/hwmon/ntc_thermistor.c b/drivers/hwmon/ntc_thermistor.c
index eab1161..9b382ec 100644
--- a/drivers/hwmon/ntc_thermistor.c
+++ b/drivers/hwmon/ntc_thermistor.c
@@ -432,19 +432,7 @@
 	.id_table = ntc_thermistor_id,
 };
 
-static int __init ntc_thermistor_init(void)
-{
-	return platform_driver_register(&ntc_thermistor_driver);
-}
-
-module_init(ntc_thermistor_init);
-
-static void __exit ntc_thermistor_cleanup(void)
-{
-	platform_driver_unregister(&ntc_thermistor_driver);
-}
-
-module_exit(ntc_thermistor_cleanup);
+module_platform_driver(ntc_thermistor_driver);
 
 MODULE_DESCRIPTION("NTC Thermistor Driver");
 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");