evdev, joydev, mousedev, tsdev - remove class device and devfs entry when
hardware driver disconnects instead of waiting for the last user to drop off. 
This way hardware drivers can be unloaded at any time.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>