romcc fixes for AMD64

[ron minnich]

On Tue, 16 Sep 2003, Stefan Reinauer wrote:

> Is there any need in going 64bit for the LinuxBIOS C payload on Opteron?
> Since the kernel does long mode switching itself this should not be the
> case, but maybe there are different opinions.

I think maybe when we start putting > 4 GB memory on these machines, I 
don't know how we're going to zero memory absent a true 64-bit C payload.

ron