[ARM] 4051/1: S3C24XX: clean includes in S3C2440 and S3C2442 support

Clean the includes in arch/arm/mach-s3c2410/s3c2440.c
and arch/arm/mach-s3c2410/s3c2442.c which should have
been pruned when these where split and updated.

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