[coreboot] Trying to add Kconfig support for M57SLI - build error

[Myles Watson]

> > > subdirs-y += mcp55
> > > This one would be here, except you mean another line...
> >
> > Yes that line.  When it was commented out I got the same error you're
> > getting, but when it isn't I don't get that error.
> >
> > Do you see the mcp55 files being built?
> Oh yeah, that was a RIGHT hint!
Great.

> But on a different level of the tree.
Oops.  I'm glad you found it anyway.  I should have looked more closely.

Thanks,
Myles