Patch from Ben Dooks

This cleans up a few items in arch/arm/mach-s3c2410
with naming of functions and a build problem. Items
which are general to s3c2410 and s3c2440 are now
named s3c24xx_ instead of s3c2410_, as well as
moving them to the correct headers.
The patch also fixes a problem where at least one
s3c2410 target had to be selected to allow an s3c2440
target to build without error.
The following have been renamed:
	s3c2410_init_irq -> s3c24xx_init_irq
	s3c2410_timer -> s3c24xx_timer

Signed-off-by: Ben Dooks
Signed-off-by: Russell King