uboot-phytec

config: Move arndale to use common exynos5250 file

Most of the arndale features are common with other exynos5250 boards. To
permit easier addition of driver model support, use the common file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>