This patch fixes multiple queues failure when virtio-user works in
server mode.
This patch adds feature negotiation in the processing of virtio-user
connection and enables multiple-queue pairs.
Fixes: bd8f50a45d0f ("net/virtio-user: support server mode")
Cc: stable@dpdk.org
Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>
201a416517