gma500: Final polish

This completes the clean up all the non Medfield C files to the point where
checkpatch approves of them barring some silly 80 column whining.

The Medfield stuff is still in a lot of flux but the rest is now ready for
general tidy and review.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>