This patch adds more err info for Tx/Rx descriptor query command.
Fixes: fae9aa717d ("app/testpmd: support checking descriptor status")
Cc: stable@dpdk.org
Signed-off-by: Hongbo Zheng <zhenghongbo3@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
Acked-by: Xiaoyun Li <xiaoyun.li@intel.com>