net/mlx4_core: Add UPDATE_QP SRIOV wrapper support

This patch adds UPDATE_QP SRIOV wrapper support.

The mechanism is a general one, but currently only source MAC
index changes are allowed for VFs.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/ethernet/mellanox/mlx4/cmd.c
Simple merge

diff --cc drivers/net/ethernet/mellanox/mlx4/mlx4.h
Simple merge

diff --cc drivers/net/ethernet/mellanox/mlx4/qp.c
Simple merge

diff --cc drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
Simple merge

diff --cc include/linux/mlx4/qp.h
Simple merge