[coreboot] Weirdness with lzma setting in v3

[Myles Watson]

Sorry in advance that I only have time to report the problem.  If no
one beats me to it I'll look into it a little more on Monday.

Something goes wrong when lzma is enabled (which it is by default)

I'm attaching my config which succeeds (nolzma.config), and the serial
output from qemu using lzma and not.  For some reason, segment0 gets
found twice when lzma is used?  Anyway, it doesn't find the devices it
should and dies.

Thanks,
Myles