[MPCore Watchdog]: Convert from misc_dev to dynamic device node.

[Wim Van Sebroeck]

Hi All,

> > I've added Wim (watchdog driver maintainer), but I would think that if
> > this change is worth doing then it should be done for all drivers.
> 
> Agreed, but today this may be more work than I'm strictly interested in
> doing. If we do decide it's the right thing then I'll look into converting the
> other drivers later.

No, we need to do it by first converting all drivers to the new API and then a
change of the API will take care of it.

Kind regards,
Wim.