ARM: dts: exynos: Include common exynos5 in exynos5410.dtsi

The exynos5.dtsi is used for common nodes shared between Exynos5250 and
Exynos542x. Since Exynos5410 is very similar to Exynos5420 it can
include the common file as well to remove duplication and make
everything more consistent.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>