satafsl: fix UAF in satafslportstop when rmmod sata_fsl
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 v4.19.220 by commit 0769449b0a5eabc3545337217ae690e46673e73a, it was introduced in version v2.6.24 by commit faf0b2e5afe7dae072d2715763c7f992b612b628. For more details please see the references link.