watchdog: cpu5wdt.c: add missing del_timer call

We do a setup_timer at init stage of the module, but we didn't
de-activate the time using del_timer.
Signed-off-by: Ndevendra.aaru <devendra.aaru@gmail.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

drivers/watchdog/cpu5wdt.c

@@ -266,6 +266,7 @@ static void cpu5wdt_exit(void)
 	if (cpu5wdt_device.queue) {
 		cpu5wdt_device.queue = 0;
 		wait_for_completion(&cpu5wdt_device.stop);
+		del_timer(&cpu5wdt_device.timer);
 	}
 
 	misc_deregister(&cpu5wdt_misc);