ARM: EXYNOS4: enable frame buffer on Nuri board

This patch adds platform definitions to enable s3c-fb driver.
Framebuffer window with 1280x800x16bpp mode has been defined.

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>