staging: comedi: pcl724: checkpatch.pl cleanup (foo*/foo *)

Fix the checkpatch.pl error:

ERROR: "(foo*)" should be "(foo *)"

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>