drm/radeon: add a force flush to delay work when radeon
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.14.293 by commit 4e25e8f27fdbdc6fd55cc572a9939bf24500b9e8. For more details please see the references link.