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 v5.10.156 by commit 709aa1f73d3e9e9ea16e2c4e44f2874c5d2c382c, it was introduced in version v5.10.154 by commit e77d213843e67b4373285712699b692f9c743f61. For more details please see the references link.