net/mlx5: HWS, added tables handling

Flow tables are SW objects that are comprised of list of matchers,
that in turn define the properties of a flow to match on and set
of actions to perform on the flows in case of match hit or miss.

Reviewed-by: Itamar Gozlan <[email protected]>
Signed-off-by: Yevgeny Kliteynik <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>

Author: kliteyn