vhost-vdpa: fix vm_flags for virtqueue doorbell mapping
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 v5.11.20 by commit 940230a5c31e2714722aee04c521a21f484b4df7, it was introduced in version v5.8 by commit ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9. For more details please see the references link.