drivers:staging:comedi:drivers:cb_das_cs.c codeing style issue

drivers: staging: comedi: cb_das16_cs.c
fixed over 80 line issue, and removed a space before tab issue.

Signed-off-by: Christopher Rice <rice.christopher.a@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>