Both pc and microvm machine types have a acpi_dev field.
Move it to the common base type.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: NSergio Lopez <slp@redhat.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Message-id: 20200915120909.20838-15-kraxel@redhat.com