raw: Fix a data-race around sysctlrawl3mdev_accept.
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 v5.4.207 by commit cc9540ba5b3652c473af7e54892a48cdced87983, it was introduced in version v5.0 by commit 6897445fb194c8ad046df4a13e1ee9f080a5a21e. For more details please see the references link.