regex/mlx5: prevent double setup of queue pair
regex/mlx5: prevent double setup of queue pair

When mlx5_regex_qp_setup() is called, make sure
the provided QP is not already setup.

Signed-off-by: Ady Agbarih <b946d71112db0ded1bd3d13824918bb575e0bfa8@gmail.com>
Acked-by: Ori Kam <dd654df5de18ba542acfaea52fe1a0799392087d@nvidia.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk