Staging: comedi: fix comment issue fixed for das800.c

This is a patch to the das800.c file that fixes up a
WARNING: 'Block comments use a trailing */ on a separate line'
found by the checkpatch.pl tool

Signed-off-by: Ravishankar Karkala Mallikarjunayya <ravishankarkm32@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>