Add support for 8 new chips to flashrom and fix up 2 existing chips

Add support for 8 new chips to flashrom and fix up 2 existing chips
as well.
Replace age-old TODO comments with real explanations.

Fixed chips:
Fujitsu MBM29F400TC (ID definition)
Macronix MX29F002T (chip name)

New chips:
Fujitsu MBM29F004BC
Fujitsu MBM29F004TC
Fujitsu MBM29F400BC
Macronix MX25L512
Macronix MX25L1005
Macronix MX25L2005
Macronix MX25L6405
Macronix MX29F002B

Straight from the data sheets, compile tested only.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3730 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1