net/bnxt: allow Tx only or Rx only

[ upstream commit 8b7e58a791ef7747266b77ed433f5d03a6abaad7 ]

Currently, we fail the init/probe of PMD if eth_dev->data->nb_tx_queues
or eth_dev->data->nb_rx_queues is 0. We are removing this check.

Fixes: daef48e ("net/bnxt: support set MTU")

Signed-off-by: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>

drivers/net/bnxt/bnxt_ethdev.c

@@ -355,7 +355,7 @@ static int bnxt_alloc_prev_ring_stats(struct bnxt *bp)
 					     sizeof(struct bnxt_ring_stats) *
 					     bp->tx_cp_nr_rings,
 					     0);
-	if (bp->prev_tx_ring_stats == NULL)
+	if (bp->tx_cp_nr_rings > 0 && bp->prev_tx_ring_stats == NULL)
 		goto error;
 
 	return 0;
@@ -908,11 +908,6 @@ int bnxt_dev_start_op(struct rte_eth_dev *eth_dev)
 	int vlan_mask = 0;
 	int rc, retry_cnt = BNXT_IF_CHANGE_RETRY_COUNT;
 
-	if (!eth_dev->data->nb_tx_queues || !eth_dev->data->nb_rx_queues) {
-		PMD_DRV_LOG(ERR, "Queues are not configured yet!\n");
-		return -EINVAL;
-	}
-
 	if (bp->rx_cp_nr_rings > RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 		PMD_DRV_LOG(ERR,
 			"RxQ cnt %d > CONFIG_RTE_ETHDEV_QUEUE_STAT_CNTRS %d\n",