drm/mediatek: Add vblank register/unregister callback functions
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 v5.18.3 by commit 3a4027b5971fe2a94e32754f007d9d3c12c68ad1, it was introduced in version v5.12 by commit 9b0704988b151824a51133dc4c921f4273c5d839. For more details please see the references link.