[patch] VRAM detection in controlfb

[Michel Lanners]

Hi Franz,

On   3 Jun, this message from Franz Sirl echoed through cyberspace:
[hacking controlfb]
> if you don't mind, would you try to replace the "dcbi" assembler instructions
> in the detection code with "dcbf" instructions? It seems Dan inherited my bug
> I had in the platinumfb driver...

Sure, no problem.

In what sense is that a bug, and what would be the symptom? I know close
to nothing about PPC assembler, and fully understanding the detection
code might help fix the detection problems we still have in some
situations...

Thanks

Michel

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