watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger

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CVE-2024-38630

In the Linux kernel, the following vulnerability has been resolved: watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdttrigger When the cpu5wdt module is removing, the origin code uses deltimer to de-activate the timer. If the timer handler is running, deltimer could not stop it and wil...