KVM: s390: enable virtio-ccw revision 1

Now that virtio-ccw has everything needed to support virtio 1.0 in
place, try to enable it if the host supports it.
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

drivers/s390/kvm/virtio_ccw.c

@@ -103,7 +103,7 @@ struct virtio_rev_info {
 };
 
 /* the highest virtio-ccw revision we support */
-#define VIRTIO_CCW_REV_MAX 0
+#define VIRTIO_CCW_REV_MAX 1
 
 struct virtio_ccw_vq_info {
 	struct virtqueue *vq;