Dealing with Bus Master Enable

[Li-Ta Lo]

YHLu,

I have a new idea about the bus master enable and
subsystem ids. We should do it with config tool.
We can add new config keywords like busmaster and
subsystem and use some generic code to enable the
bit and program the subsystems ids. Thus we can
remove a lot of codes in src/driver and mainboard/tyan.
How do you think ?

Ollie