video: fbdev: cirrusfb: check pixclock to avoid divide by zero
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 v5.4.189 by commit 53a2088a396cfa1da92690a1da289634cd73bf0d. For more details please see the references link.