net/mlx5: Fix create vport flow table flow

Send vport number to the create flow table inner method instead of
ignoring the vport argument and sending always 0.

Fixes: b3ba5149 ('net/mlx5: Refactor create flow table method to accept underlay QP')
Signed-off-by: Mohamad Haj Yahia <mohamad@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>