Staging: go7007: fix braces coding style issue in wis-tw2804.c

This is a patch to the wis-tw2804.c to fix the braces coding style issue as pointed by checkpatch.pl tool

Signed-off-by: Pradheep Shrinivasan <pradheep.sh@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>