HWMON: ams - convert to use input-polldev

Switch to using input-polldev skeleton instead of implementing polling
loop by itself.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Acked-by: Michael Hanselmann <linux-kernel@hansmi.ch>
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index f0ab2ac..99c82b1 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -131,6 +131,7 @@
 config SENSORS_AMS
 	tristate "Apple Motion Sensor driver"
 	depends on PPC_PMAC && !PPC64 && INPUT && ((ADB_PMU && I2C = y) || (ADB_PMU && !I2C) || I2C) && EXPERIMENTAL
+	select INPUT_POLLDEV
 	help
 	  Support for the motion sensor included in PowerBooks. Includes
 	  implementations for PMU and I2C.