fbcon: Use kzalloc() in fbconpreparelogo()
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 v5.15.83 by commit e70a5724400a841c9857ee3d08dae4d6c53ee40d. For more details please see the references link.