Realize the symmetric algorithm control queue handler,
including plain cipher and chainning algorithms.
Currently the control queue is used to create and
close session for symmetric algorithm.
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>