Completely rip out / replace the ASUS P2B code (which wasn't really working),

Completely rip out / replace the ASUS P2B code (which wasn't really working),
replacing it with a minimal, but working, framework which will be expanded.
Drop a bunch of useless and duplicated files, add missing license headers.

I'm self-acking it this time, the diff is a huge unreadable mess and the old
code is broken anyway...

This code is tested to build fine, and can boot a Linux kernel up to a
login-prompt via FILO (IDE). This is verified on actual hardware.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2859 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1