[PATCH] support firmware reboot when CAS changes are detected.

[Paul Nasrat]

> When this firmware initiated reboot occurs yaboot will now boot the same
> kernel
> as the previous boot attempt with no action by the user needed.
> I have successfully booted on POWER5 and POWER6 machines using various
> levels of
> the kernel.

Commited, I don't have the h/w to test this but eyeballed and tested
booting on my ibook to test for regressions

Paul