This board has been renamed recently and announced at
https://eragon.einfochips.com/products/sd-600eval.html

So rename this board files so that it reflects actual product in market.
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: NAndy Gross <andy.gross@linaro.org>