Staging: rtl8188eu: Fix warning of braces not necessary.

This small patch fixes the warning of "braces are
necessary for any arm of this statement" in file rtw_efuse.c.

Signed-off-by: Elena Oat <oat.elena@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>