Staging: comedi: fix brace and printk coding style issue in serial2002.c

This is a patch to the serial2002.c file that fixes up a brace and printk  warning found by the checkpatch.pl tool

Signed-off-by: Ravishankar <ravishankarkm32@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>