net/mlx5: fix Tx queue reference count check

net/mlx5: fix Tx queue reference count check

The Txq refcnt 1 value means that there is no real reference to the
queue and only the control configurations are saved in the struct.

The patch below wrongly didn't consider it and caused a leak in the Txq
object resource.

Revert the specific update in the refcnt.

Fixes: b5c8b3e70cdf ("net/mlx5: use C11 atomics for RxQ/TxQ refcounts")
Signed-off-by: Matan Azrad <matan@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>