x86/kvm: fix FASTOP_SIZE when return thunks are enabled
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 v5.10.133 by commit 8e31dfd6306e7c6bb3758a459c2a6067be807886, it was introduced in version v5.10.133 by commit c9eb5dcdc8f4a848b45b97725f5a2b8d324bb31a. For more details please see the references link.