0x6?0000, load at 0xe00000. This gives us room for around 13 MB of
kernel, as opposed to the current 5 MB (0x600000 - 0x100000).
No changes to load-base or real-base are needed due to this change,
though machines that needed specific OFW settings before (OF 1.x
and 2.x) this change still need those settings.
Partially revert revision 1.25 -> 1.26 of ofwboot/Makefile & friends.
We do not need to distinguish between where ofwboot and ofwboot.{elf,xcf}
load; they are both fine loading somewhere other than load-base.
74fec3bc40