Staging: xgifb: Removed thousands of warnings.

This is a big patch to remove all the warnings given by checkpatch.pl.
There were 13348 errors and  3112 warnings, but now there's nothing.
I've compiled the files dependent on this header and they seem alright.
Signed-off-by: NDaniel Kenji Toyama <kenji.toyama@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>