dpif-netdev: Use PMD context to get the port for HW miss recovery.

Last RX queue, from which the packet got received, is already stored
in the PMD context.  So, we can get the netdev from it without the
expensive hash map lookup.

In my V2V testing this patch improves performance in case HW offload
and experimental APIs are enabled by about 3%.  That narrows down the
performance difference with the case with experimental API disabled
to about 0.5%, which is way within a margin of error for that setup.

Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Acked-by: Eli Britstein <elibr@nvidia.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>

lib/dpif-netdev-private.h

@@ -46,7 +46,6 @@ dp_netdev_batch_execute(struct dp_netdev_pmd_thread *pmd,
 
 int
 dp_netdev_hw_flow(const struct dp_netdev_pmd_thread *pmd,
-                  odp_port_t port_no,
                   struct dp_packet *packet,
                   struct dp_netdev_flow **flow);