staging: rtl8192e: Fix void function return statements style

Fixes "void function return statements are not generally
useful"checkpatch.pl warning in rtl819x_HTProc.c

Signed-off-by: Melike Yurtoglu <aysemelikeyurtoglu@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>