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 v5.4.227 by commit 9d5126b574c9177ed9ca925e36f85a1e6ce80bd2. For more details please see the references link.