Staging: comedi: fix brace coding style issue in das16m1.c

This is a patch to the das16m1.c file that fixes up a brace coding
warning found by the checkpatch.pl tool.

Signed-off-by: Ravishankar Karkala Mallikarjunayya <ravishankar.km@greenturtles.in>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>