staging: rtl8723au: Fix case where ethtype was never obtained and always be checked...

Zero-initializing ether_type masked that the ether type would never be
obtained for 8021x packets and the comparition against eapol_type
would always fail.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/rtl8723au/core/rtw_recv.c
Simple merge