ARM: S3C2416: Change S3C2416 NAND platform device name

This patch changes the platform device name from 's3c2416-nand' to
's3c2412-nand' so that S3C2416 can reuse the nand functionality
available on S3C2412.

Signed-off-by: Atul Dahiya <atul.dahiya@samsung.com>
Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>