This diff makes the onboard Visualize EG graphics on the C180 (and
possibly other models) work. I'm fairly sure this makes the current
hack for the Visualize EG unnecessary. However, this needs some
testing on machines with non-PCI sti(4). So if you have
sti0 at mainbus0 ...
sti0 at phantomas0 ...
sti0 at uturn ...
or something like
"GIO Graphics" ... not configured
in your dmesg, please give this a go and send me the resulting dmesg.