Staging: comedi: fix brace coding style issue in jr3_pci.c

This is a patch to the jr3_pci.c file that fixes up a brace warning
found by the checkpatch.pl tool

Signed-off-by: Stephane Pajot <pajot.stephane@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>