Staging: rtl8187se: Remove unnecessary braces around single statement in dot11d.c

This patch fixes the following checkpatch.pl issues in
ieee80211/dot11d.c-
WARNING: braces {} are not necessary for single statement blocks

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>