[LinuxBIOS] [PATCH] AMD CS5530 rewrite

[Uwe Hermann]

Hi,

I posted this several weeks ago (and it got an ACK), but I never
comitted it; I'm reposting again just in case, as I did some
improvements on the code.

This is verified to build and work on real hardware (ASI MB-5BLMP).

It's quite likely that this is needed to fix one or two other targets
(one in the repo and one still in development).

Uwe.