mISDN: fix misuse of putdevice() in mISDNregister_device()
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 v5.15.80 by commit 596230471da3415e92ae6b9d2a4e26f4a81cac5a, it was introduced in version v5.15.78 by commit 029d5b7688a2f3a86f2a3be5a6ba9cc968c80e41. For more details please see the references link.