net/mlx5: DR, Split reformat state to Encap and Decap

Split single reformat state into two separate states for encap and decap.
This will allow adding actions to the specific domain, such as encap on RX.

Signed-off-by: Erez Shitrit <erezsh@nvidia.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>