rfkill: update LEDs for all state changes

The LED state was not being updated by rfkill_force_state(), which
will cause regressions in wireless drivers that had old-style rfkill
support and are updated to use rfkill_force_state().

The LED state was not being updated when a change was detected through
the rfkill->get_state() hook, either.

Move the LED trigger update calls into notify_rfkill_state_change(),
where it should have been in the first place.  This takes care of both
issues above.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>