net: Fix a data-race around netdevunregistertimeout_secs.
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 v5.19.6 by commit 8a536935207a66b3cb1506b7b3ba5fdbad91525a, it was introduced in version v5.13 by commit 5aa3afe107d9099fc0dea2acf82c3e3c8f0f20e2. For more details please see the references link.