virtio: add definition of VIRTIO_F_NOTIF_CONFIG_DATA feature bit

virtio: add definition of VIRTIO_F_NOTIF_CONFIG_DATA feature bit

This patch adds the definition of VIRTIO_F_NOTIF_CONFIG_DATA feature bit
in the relevant header file.

This feature indicates that the driver uses the data provided by the
device as a virtqueue identifier in available buffer notifications.

It comes from here:
    https://github.com/oasis-tcs/virtio-spec/issues/89

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Message-Id: <20231010031120.81272-2-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>