We can move this define now that less files use it to internal.h to
further reduce dependency on hw/ide.h.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-id: e68675d2f6252f229cf788b7cd163bb76fa3e26b.1584457537.git.balaton@eik.bme.hu
Signed-off-by: John Snow <jsnow@redhat.com>