net/mlx5: mlx5_ifc support for header insert/remove

Add support for HCA caps 2 that contains capabilities for the new
insert/remove header actions.

Added the required definitions for supporting the new reformat type:
added packet reformat parameters, reformat anchors and definitions
to allow copy/set into the inserted EMD (Embedded MetaData) tag.

Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Jianbo Liu <jianbol@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>