MFC r272103: Move s3c2xx0 into the samsung directory.

Move the ARM Samsung s3c2xx0 support files into the samsung directory, to
match other platforms.

Discussed with: andrew

Add support for the Samsung S3C2xx0 family of ARM SoCs written by
Andrew Turner. The kernel supports the LN2410SBC evaluation board,
and likely others. These parts (or similar ones) are in some open
hardware designs for phones.

Submitted by: Andrew Turner