Patch from Ben Dooks

Updates for the Simtec BAST (EB2410ITX) default configuration
to fix the following:

- add mtd support for NAND and NOR
- remove PC style parallel port (does not build)
- use S3C2410 core RTC for time
- remove non-bast S3C2410 machines

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