[media] hdmi: add new HDMI 2.0 defines

Add new Video InfoFrame colorspace information introduced in HDMI 2.0
and new Audio Coding Extension Types, also from HDMI 2.0.

HDMI_CONTENT_TYPE_NONE was renamed to _GRAPHICS since that's what
it is called in CEA-861-F.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>