virtio was missing this call to clean up core plane usage.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170215180009.7091-1-gustavo@padovan.orgSigned-off-by: Gerd Hoffmann <kraxel@redhat.com>