comedi: vmk80xx: fix expression for tx buffer size
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 v5.18.6 by commit f3390c7b160fd0ff99e98c9df2f824a21496fdf5, it was introduced in version v5.16 by commit a23461c47482fc232ffc9b819539d1f837adf2b1. For more details please see the references link.