app/testpmd: fix max queue number for Tx offloads
app/testpmd: fix max queue number for Tx offloads

When txq offload is configured, max rxq is used as the max queue. This
patch fixes it.

Fixes: 74453ac9ef67 ("app/testpmd: fix queue offload configuration")
Cc: stable@dpdk.org

Signed-off-by: Chengchang Tang <c3ddc20cc64e98ec759ab2989e2da0f93b89cab6@huawei.com>
Signed-off-by: Min Hu (Connor) <f02e10cb0a484c51b0f8634f83fbb4ab9ded1c6a@huawei.com>
Acked-by: Xiaoyun Li <151cc00bdba86cfa2ecfc39aaa98def8f092d9d8@intel.com>

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