net/i40e: fix Tx queue setup after stop

net/i40e: fix Tx queue setup after stop

Currently, i40e_dev_tx_queue_setup_runtime checks simple tx and treats
mbuf fast free offloading as No-simple, which is classified as simple tx
in i40e_set_tx_function_flag. This inconsistent behavior causes tx queue
setup fail after queue was stopped. This patch fixes this bug.

Fixes: 399421100e08 ("net/i40e: fix missing mbuf fast free offload")
Cc: stable@dpdk.org
Signed-off-by: Shaopeng He <shaopeng.he@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>