Input: appletouch - idle reset logic broke older Fountains

Fountains do not support change mode request and therefore
should be excluded from idle reset attempts.

Also:
 - do not re-submit URB when we decide that touchpad needs to be
   reinicialized
 - do not repeat size detection when reinitializing the touchpad
 - Add missing KERN_* prefixes to messages

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Acked-by: Johannes Berg <johannes@sipsolutions.net>