vdpa/mlx5: support stateless offloads

vdpa/mlx5: support stateless offloads

Add support for the next features in virtq configuration:
	VIRTIO_F_RING_PACKED,
	VIRTIO_NET_F_HOST_TSO4,
	VIRTIO_NET_F_HOST_TSO6,
	VIRTIO_NET_F_CSUM,
	VIRTIO_NET_F_GUEST_CSUM,
	VIRTIO_F_VERSION_1,

These features support depends in the DevX capabilities reported by the
device.

Signed-off-by: Matan Azrad <matan@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>