HWMON: applesmc - convert to use input-polldev

Switch to using input-polldev skeleton instead of implementing polling loop by
itself.  This also fixes problem with trylock on a mutex in atomic context.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --cc drivers/hwmon/Kconfig
Simple merge

diff --cc drivers/hwmon/applesmc.c
Simple merge