ARM: EXYNOS: Add DRM core support for NURI board

Add core DRM device and alternative platform device data
for FIMD DRM subdriver. Based on the initial patch by
Joonyoung Shim <jy0922.shim@samsung.com>.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>