net/memif: remove unnecessary Rx interrupt stub

[ upstream commit d6dccbd76692c64cff79a821bc73069dc5b043e4 ]

The code in memif driver to stub out rx_irq_enable is unnecessary
and causes different error returns than other drivers.
The core ethdev code will return -ENOTSUP if the driver has
a null rx_queue_intr_enable callback.

Fixes: 09c7e63 ("net/memif: introduce memory interface PMD")

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

drivers/net/memif/rte_eth_memif.c

@@ -1412,23 +1412,6 @@ memif_stats_reset(struct rte_eth_dev *dev)
 	return 0;
 }
 
-static int
-memif_rx_queue_intr_enable(struct rte_eth_dev *dev __rte_unused,
-			   uint16_t qid __rte_unused)
-{
-	MIF_LOG(WARNING, "Interrupt mode not supported.");
-
-	return -1;
-}
-
-static int
-memif_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t qid __rte_unused)
-{
-	struct pmd_internals *pmd __rte_unused = dev->data->dev_private;
-
-	return 0;
-}
-
 static const struct eth_dev_ops ops = {
 	.dev_start = memif_dev_start,
 	.dev_close = memif_dev_close,
@@ -1438,8 +1421,6 @@ static const struct eth_dev_ops ops = {
 	.rx_queue_setup = memif_rx_queue_setup,
 	.rx_queue_release = memif_queue_release,
 	.tx_queue_release = memif_queue_release,
-	.rx_queue_intr_enable = memif_rx_queue_intr_enable,
-	.rx_queue_intr_disable = memif_rx_queue_intr_disable,
 	.link_update = memif_link_update,
 	.stats_get = memif_stats_get,
 	.stats_reset = memif_stats_reset,