radeonsi: add config entry for Counter-Strike Global Offensive
This fixes rendering issues with gun scopes which is rather important. Cc: "19.0" "19.1" <mesa-stable@lists.freedesktop.org> Acked-by:Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100239