Currently, the hns3 PMD may free more mbufs than free_cnt parameter,
this is an incorrect implementation. This patch fixes it.
Fixes: 0b77e8f3d364 ("net/hns3: optimize Tx performance")
Cc: stable@dpdk.org
Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>