radv: replace discard with demote for Quantic Dream games
Detroit: Become Human uses dFdx/dFdy immediately after a quad-divergent discard, which can cause the image to become white. Signed-off-by:Rhys Perry <pendingchaos02@gmail.com> Reviewed-by:
Daniel Schürmann <daniel@schuermann.dev> Reviewed-by:
Samuel Pitoiset <samuel.pitoiset@gmail.com> Cc: <mesa-stable@lists.freedesktop.org> Closes: mesa/mesa#3212 Part-of: <mesa/mesa!5991> (cherry picked from commit d9072a11)