Staging: comedi: fix spacing coding style issue in 8255.c.

This patch for 8255.c fixes a spacing warning found by checkpatch.pl.

Signed-off-by: Chase Southwood <chase.southwood@yahoo.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>