watchdog: bcm7038: add device tree binding documentation

Add device tree binding documentation for the watchdog hardware block
on bcm7038 and newer SoCs.

Signed-off-by: Justin Chen <[email protected]>
Acked-by: Rob Herring <[email protected]>
Acked-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>
1 file changed