s390: qeth driver connection hang

      Frank Pavlic <fpavlic@de.ibm.com>

Connection hangs when using EDDP mode because sk_protocol is NULL
when skb has been copied via skb_copy. This results in dropping
packets.
Also keep MAC address after recovery of Virtual NICs so that
traffic can flow again and duplicate statements in
qeth_dev_set_route_store removed.

Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>