net/mlx4_core: Report driver version to FW

If supported, write a driver version string to FW as part of the
INIT_HCA command.

Example of driver version: "Linux,mlx4_core,4.0-0"

Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>