staging: rtl8712: remove unnecessary else after return

Fixes checkpatch warning:
WARNING: else is not generally useful after a break or return

Signed-off-by: Mike Krinkin <krinkin.m.u@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/rtl8712/rtl8712_recv.c
Simple merge