nfc: nci: add flush_workqueue to prevent uaf
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 v5.4.190 by commit 5c63ad2b0a267a524c12c88acb1ba9c2d109a801, it was introduced in version v3.2 by commit 6a2968aaf50c7a22fced77a5e24aa636281efca8. For more details please see the references link.