util: add workaround for Full Bore
Unfortunately I contacted the dev about this issue years ago and he made a fix, but it has never been released after all these years. This stops the screen from being completely black in game. CC: mesa-stable Reviewed-by:Marek Olšák <marek.olsak@amd.com> Part-of: <mesa/mesa!11941> (cherry picked from commit f3ec4a93)