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

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 <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
Acked-by: Kukjin Kim <[email protected]>
Signed-off-by: Olof Johansson <[email protected]>