[PATCH V8 30/43] drm/colorop: add BT2020/BT709 OETF and Inverse OETF

[Simon Ser]

Note, this patch adds new values in the middle of the enum. This is in
general a breaking uAPI change: all enum values afterwards will get
re-numbered.

Maybe this patch should come before the PQ 125 one. In this series it
shouldn't matter either way because we're also introducing the enum, but
(1) who knows what/how distros might end up cherry-picking (2) future
patches might take inspiration from this one.

With that fixed:

Reviewed-by: Simon Ser <contact at emersion.fr>