net/mlx5e: Dynamic RQ type infrastructure

Add two helper functions to allow dynamic changes of RQ type.

mlx5e_set_rq_priv_params and mlx5e_set_rq_type_params will be
used on netdev creation to determine the default RQ type.

This will be needed later for downstream patches of XDP support.
When enabling XDP we will dynamically move from striding RQ to
linked list RQ type.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>