net/cnxk: fix crash during hotplug detach operation

net/cnxk: fix crash during hotplug detach operation

hot_plug application does not perform any port setup
configuration via rte_eth_dev_configure() API. All the probed
Ethernet ports do not contain any Rx and Tx queues.

While detaching a device via rte_eal_hotplug_remove(), CNXK
driver expects Rx and Tx queues structures populated during
reset of PFC. So application gets crashed as data->rx_queues
and data->tx_queues are NULL.

Fixes: 9544713564f5 ("net/cnxk: support priority flow control")
Cc: stable@dpdk.org
Signed-off-by: Sunil Kumar Kori <skori@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>