Re: [PATCH] virtio-net: define the VIRTIO_NET_F_CTRL_RX_EXTRA feature bit

[Alvaro Karsz <alvaro.karsz@solid-run.com>]

I didn't add the control vq feature as a feature bit requirement for
the same reason as [1].

If you think that we can add a feature bit requirement instead of
"SHOULD NOT offer" and "SHOULD NOT negotiate", I can add it in v2.

[1] https://github.com/oasis-tcs/virtio-spec/issues/158