usb: mtu3: fix list_head check warning
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 v5.15.13 by commit 249ddfbe00570d6dc76208e88017937d4d374c79, it was introduced in version v5.2 by commit 83374e035b6286731c5aa617844c7b724294c2a7. For more details please see the references link.