vhost-user: ignore qemu-only features

Some features (such as ctrl vq) are supported
by qemu without need to communicate with the
backend.

Drop them from the feature mask so we set them
unconditionally.
Reported-by: NVictor Kaplansky <vkaplans@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/net/vhost_net.c

@@ -77,14 +77,8 @@ static const int user_feature_bits[] = {
     VIRTIO_NET_F_HOST_ECN,
     VIRTIO_NET_F_HOST_UFO,
     VIRTIO_NET_F_MRG_RXBUF,
-    VIRTIO_NET_F_STATUS,
-    VIRTIO_NET_F_CTRL_VQ,
-    VIRTIO_NET_F_CTRL_RX,
-    VIRTIO_NET_F_CTRL_VLAN,
-    VIRTIO_NET_F_CTRL_RX_EXTRA,
-    VIRTIO_NET_F_CTRL_MAC_ADDR,
-    VIRTIO_NET_F_CTRL_GUEST_OFFLOADS,
 
+    /* This bit implies RARP isn't sent by QEMU out of band */
     VIRTIO_NET_F_GUEST_ANNOUNCE,
 
     VIRTIO_NET_F_MQ,