Patch from Ben Dooks

Use the cpu-type detected in arch/arm/mach-s3c2410/cpu.c
to work out which uart initialisation routine to call,
instead of relying on the one called within mach-xxxx.c.

This allows one machine-type to run with either an 2410 or
2440 cpu installed.

Thanks to Dimitry Andric for the original patch.

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