[ARM] 3774/1: S3C24XX: SMDK2413 has two machine IDs

Patch from Ben Dooks

It turns out we have both SMDK2413 and S3C2413 for
the same board.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>