ARM: S5P6450: Add LCD-LTE480 and enable Framebuffer support

This patch:
	-- Adds platform device support for LCD-LTE480.
	-- Adds platform data for FB with win_mode and default_bpp.
	-- Enables FB device support and platform-lcd support.
	-- Adds SPCON settings for LCD.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>