video: s3c-fb: Add S5P64X0 specific s3c_fb_driverdata

This patch:
	-- Adds s3c_fb_driverdata for S5P64X0, which supports 3 windows.
	-- Also, register "s5p64x0-fb" type driver_data.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>