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 v5.15.47 by commit c926ae58f24f7bd55aa2ea4add9f952032507913, it was introduced in version v4.4 by commit 7d267278a9ece963d77eefec61630223fce08c6c. For more details please see the references link.