CNB: net: add netif_set_real_num_queues() for device reconfig

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2094002
Tested: Just build. Only new helper that is not used yet.

Commits:

271e5b7d00ae ("net: add netif_set_real_num_queues() for device reconfig")

Signed-off-by: Ivan Vecera ivecera@redhat.com