ARM: dts: exynos: Add UHS-I bus speed support to Odroid XU3/XU4/HC1

Add support for UHS-I bus speed tuning for SDR50, DDR50 and SDR104 to
Odroid XU3/XU4/HC1 family boards.

Signed-off-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>