ARM: dts: exynos4210: Add basic dts file for universal_c210 board

This patch adds basic device tree sources for Universal C210 board.

Currently support includes:
- eMMC
- serial
- max8952 and max8998 voltage regulators.
- gpio-keys

More support will be added in further patches.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Olof Johansson <olof@lixom.net>