virtio-ccw: migrate ->revision

We need to migrate the revision field as well. No compatibility
concerns as we already introduced migration of ->config_vector in
this release.
Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>

hw/s390x/virtio-ccw.c

@@ -1472,6 +1472,7 @@ static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f)
     qemu_put_be16(f, vdev->config_vector);
     qemu_put_be64(f, dev->routes.adapter.ind_offset);
     qemu_put_byte(f, dev->thinint_isc);
+    qemu_put_be32(f, dev->revision);
 }
 
 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
@@ -1512,6 +1513,7 @@ static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
                                        dev->thinint_isc, true, false,
                                        &dev->routes.adapter.adapter_id);
     }
+    dev->revision = qemu_get_be32(f);
 
     return 0;
 }