vhost/test: fix up after API change

Pass a flag to request kernel thread use.

Fixes: 01fcb1cb ("vhost: allow device that does not depend on vhost worker")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

drivers/vhost/test.c

@@ -120,7 +120,7 @@ static int vhost_test_open(struct inode *inode, struct file *f)
 	vqs[VHOST_TEST_VQ] = &n->vqs[VHOST_TEST_VQ];
 	n->vqs[VHOST_TEST_VQ].handle_kick = handle_vq_kick;
 	vhost_dev_init(dev, vqs, VHOST_TEST_VQ_MAX, UIO_MAXIOV,
-		       VHOST_TEST_PKT_WEIGHT, VHOST_TEST_WEIGHT, NULL);
+		       VHOST_TEST_PKT_WEIGHT, VHOST_TEST_WEIGHT, true, NULL);
 
 	f->private_data = n;