net/mlx5: add hash list extended lookup and insert

net/mlx5: add hash list extended lookup and insert

The mlx5 PMD hashed list was designed in approach to contain the items
with unique keys only. Now there is the need to store the objects with
possible key collisions. It is not expected to have many collisions
(very likely to have a few ones), but keys become not unique.

This commit adds the hash list extended functions in order to support
insertion and lookup for the lists with non-unique keys.

Signed-off-by: Suanming Mou <suanmingm@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>