staging: comedi: das08_cs: don't split Author string

fixes checkpatch.pl WARNING: quoted string split across lines

+MODULE_AUTHOR("David A. Schleef <ds@schleef.org>, "
+             "Frank Mori Hess <fmhess@users.sourceforge.net>");

Modules with multiple authors have a MODULE_AUTHOR line for each one.

Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>