common/mlx5: fix build with rdma-core 21

common/mlx5: fix build with rdma-core 21

drivers/common/mlx5/mlx5_glue.c: In function 'mlx5_glue_devx_qp_query':
drivers/common/mlx5/mlx5_glue.c:1010:9: error:
implicit declaration of function 'mlx5dv_devx_qp_query'

The function mlx5dv_devx_qp_query() was added in rdma-core 22.
This function is compiled only if HAVE_IBV_DEVX_OBJ,
which is true if the function mlx5dv_devx_obj_create is found.
Unfortunately mlx5dv_devx_obj_create() was introduced in rdma-core 21,
when mlx5dv_devx_qp_query() did not exist yet.

A new flag HAVE_IBV_DEVX_QP is added when mlx5dv_devx_qp_query()
is found.

Fixes: 62d6f70f30f4 ("net/mlx5: add glue for queue query via DevX")
Cc: stable@dpdk.org
Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>