watchdog: documentation: describe nowayout in coversion-guide

+};

Handle the 'nowayout' feature

-----------------------------

A few drivers use nowayout statically, i.e. there is no module parameter for it

and only CONFIG_WATCHDOG_NOWAYOUT determines if the feature is going to be

used. This needs to be converted by initializing the status variable of the

watchdog_device like this:

        .status = WATCHDOG_NOWAYOUT_INIT_STATUS,

Most drivers, however, also allow runtime configuration of nowayout, usually

by adding a module parameter. The conversion for this would be something like:

	watchdog_set_nowayout(&s3c2410_wdd, nowayout);

The module parameter itself needs to stay, everything else related to nowayout

can go, though. This will likely be some code in open(), close() or write().

Register the watchdog device

----------------------------