mt76: mt7615: fix memleak when mt7615unregisterdevice()
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 v5.12.4 by commit 6c5b2b0c6e5a6ce2d8f9f85b8b72bfad60eaa506, it was introduced in version v5.12 by commit a6275e934605646ef81b02d8d1164f21343149c9. For more details please see the references link.