anv,radv: Update release notes for newly implemented extensiosn
A lot has happened in those two drivers since the 19.0 release and we keep forgetting to update release notes. Time to bring everything up to date again before 19.1 gets released.
A lot has happened in those two drivers since the 19.0 release and we keep forgetting to update release notes. Time to bring everything up to date again before 19.1 gets released.