[V7 23/45] drm/amd/display: Ignore deprecated props when plane_color_pipeline set

[Simon Ser]

Is this "ignore" something we could do at the core DRM level, instead
of doing it in all drivers? e.g. by silently ignoring user-space requests
to set the property?

It sounds like this codepath still resets the colorspace to sRGB, which
is later overwritten by colorops pulled in the atomic state anyways.