vfio/igd: add Gemini Lake and Comet Lake device ids

vfio/igd: add Gemini Lake and Comet Lake device ids

Both Gemini Lake and Comet Lake are gen 9 devices. Many user reports
on internet shows legacy mode of igd passthrough works as qemu treats
them as gen 8 devices by default before e433f208973f ("vfio/igd:
return an invalid generation for unknown devices").

Reviewed-by: Corvin Köhne <c.koehne@beckhoff.com>
Signed-off-by: Tomita Moeko <tomitamoeko@gmail.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Link: https://lore.kernel.org/r/20241206122749.9893-6-tomitamoeko@gmail.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>