afunix: Fix a data-race in unixdgrampeerwake_me().
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 v5.4.198 by commit 556720013c36c193d9cbfb06e7b33e51f0c39fbf, it was introduced in version v4.4 by commit 7d267278a9ece963d77eefec61630223fce08c6c. For more details please see the references link.