Staging: comedi: fix line over 80 character warning in unioxx5.c

This is a patch to fix a line over 80 character warning found by
checkpatch.pl in a comment. The comment was reworded to fix
the warning

Signed-off-by: Conrad Gomes <conrad.s.j.gomes@gmail.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>