ARM: S3C24XX: Introduce S3C2442B CPU

Add the S3C2442B CPU ID to aid support the Openmoko GTA02 / Freerunner.

Signed-off-by: Harald Welte <laforge@gnumonks.org>
Signed-off-by: Andy Green <andy@warmcat.com>
Signed-off-by: Nelson Castillo <arhuaco@freaks-unidos.net>
[ben-linux@fluff.org: edit description for clarity and S3C2442B as uppercase]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>