net/mlx5: mlx5_ifc, Add hardware definitions needed for adjacent vports

Next patches will implement the discovery and creation of adjacent
functions vports, this patch introduces the hardware structures
definitions needed for the driver implementation.

Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Jack Morgenstein <jackm@nvidia.com>
Signed-off-by: Alexei Lazar <alazar@nvidia.com>