qed: Pass MAC hints to VFs

qed: Pass MAC hints to VFs

Orabug: 25477939

Some hypervisors can support MAC hints to their VFs.
Even though we don't have such a hypervisor API in linux, we add
sufficient logic for the VF to be able to receive such hints and
set the mac accordingly - as long as the VF has not been set with
a MAC already.

Signed-off-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit c3aaa403840a5ccd305fb5e73f3cbfac6453b5e5)
Signed-off-by: Brian Maly <brian.maly@oracle.com>