[ARM] 3793/1: S3C2412: fix wrong serial info struct

Patch from Ben Dooks

The S3C2440 serial info struct is being passed
through the S3C2412 serial info struct probe
routine.

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