net/mlx5: Avoid false positive lockdep warning by adding lockclasskey
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 v5.15.64 by commit e161c24a92efc983233cde901327ec86659280c0, it was introduced in version v5.12 by commit 6a3273217469790e6d0abc73893d0ebe6b69180d. For more details please see the references link.