ARM: highbank: add devicetree source

This adds the devicetree source and documentation for the Calxeda highbank
platform.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Reviewed-by: Jamie Iles <jamie@jamieiles.com>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
2 files changed