media: media/pci/ngene/ngene.h: remove #ifdef NGENE_V4L

Remove the dead code under NGENE_V4L.

Among others, this removes references to the old videobuf framework
that isn't actually used by this driver.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>