staging: rtl8188eu: remove unnecessary braces

This commit fixes the following checkpatch.pl warning:
WARNING: braces {} are not necessary for single statement blocks

Signed-off-by: Jan Gruber <j4n6ru@gmail.com>
Link: https://lore.kernel.org/r/20210705072125.199810-1-j4n6ru@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>