vdpa: do not set virtio status bits if unneeded

Next commits will set DRIVER and ACKNOWLEDGE flags repeatedly in the
case of a migration destination.  Let's save ioctls with this.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20231215172830.2540987-2-eperezma@redhat.com>
1 file changed