[PATCH] Corgi Keyboard: Code tidying

The input system handles key state tracking so there's no need for the driver
to do so as well.  Also tidy up some comment formatting and remove a now
unneeded function.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>