Add support for a couple of BIOS ROM devices.

The patch has been committed to the MTD CVS tree and adds entries to
jedec_probe.c for AMD AM29F002T, Hyundai HY29F002T and Macronix
MX29F002T parts.

This version is slightly updated from the previous once since I
accidentally added MANUFACTURER_MACRONIX when it already existed.  I
also moved the new definitions to go along with the alphabetical by
manufacturer layout of the file. 
Signed-off-by: Ian Campbell <icampbell@arcom.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>