Making progress on if_bfe - fixed!

[Mike Silbersack]

Well, I think it's finally fixed this time.  I just committed changes 
to both if_bfe and to the busdma subsystem for i386 and amd64.

The reason changing if_bfereg.h affected things is because changing the 
RX/TX list sizes was changing how they were aligned, and the broadcom 4400 
series cares deeply about how things are aligned.

Please cvsup and tell me how it goes (good or bad.)

Thanks,

Mike "Silby" Silbersack