[coreboot] More v3 questions/issues

[ron minnich]

one more note.

It's looking, increasingly, like future CPUs will require
initlalization very early in startup. Some will require it right after
initram; some during initram; and some BEFORE initram.

But they will all require it in what we call stage 1 -- before the
device tree exists.

The implication is that the device tree may not be that useful in
future for "CPUs as devices". I think we should plan around this. CPUs
were always kind of a stretch to make a device anyway. Just FYI.

ron