staging: line6: pod.c: fix checkpatch warning

 - WARNING: braces {} are not necessary for single statement blocks

Signed-off-by: Laurent Navet <laurent.navet@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>