[OpenBIOS] building openfirmware

[Programmingkid]

I was wondering if openfirmware could be made easier to build. I suggest that it use the configure-make strategy that most unix programs use. The configure command should be at the top level of the openfirmware folder and would allow the user to set the architecture and other options from there. This change would make things a lot easier for developers since they wouldn't have to hunt for the make file.