Input: pass EV_PWR events to event handlers

input_handle_event() used to pass EV_PWR events to event handlers
but no longer does so in 2.6.23. Modules to trigger power management
events based on input power events exist but rely on the EV_PWR events
being passed to the input event handlers.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>