crypto/virtio: support basic PMD ops

crypto/virtio: support basic PMD ops

This patch implements the basic operations of virtio crypto PMD, which
includes start, stop, close, information getting, queue setup and
release of the device.
The virtio crypto device has two types of queues, data queue and
control queue. It has one data queue at least and has one and only one
control queue. For example, if a virtio crypto device has N queues,
then [0, N-2] is the data queue index, N-1 is the control
queue index.

Signed-off-by: Jay Zhou <jianjay.zhou@huawei.com>
Reviewed-by: Fan Zhang <roy.fan.zhang@intel.com>