Merge branch 'mlx4'

Amir Vadai says:

====================
net/mlx4: Mellanox driver update 07-11-2013

This patchset contains some enhancements and bug fixes for the mlx4_* drivers.
Patchset was applied and tested against commit: "9bb8ca86 virtio-net: switch to
use XPS to choose txq"
====================

Signed-off-by: David S. Miller <davem@davemloft.net>