linux-wandboard

ARM: davinci: da850: add wdt DT node

Add da850 wdt DT node.
Add OF_DEV_AUXDATA for wdt driver to use wdt clock.

Signed-off-by: Kumar, Anil <anilkumar.v@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>