net/mlx5: Introduce ifc bits for pre_copy

Introduce ifc related stuff to enable PRE_COPY of VF during migration.

Signed-off-by: Shay Drory <shayd@nvidia.com>
Acked-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20221206083438.37807-2-yishaih@nvidia.com


Signed-off-by: Alex Williamson <alex.williamson@redhat.com>