watchdog: Fix possible use-after-free in wdt_startup()
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 v5.4.134 by commit 146cc288fb80c662c9c35e7bc58325d1ac0a7875. For more details please see the references link.