[coreboot] Patch for enableing 440BX NB to use large memory modules

[Anders Jenbo]

440BX can partially use memory larger then what is supported by seeing
them as being a max size supported module.

Single sided 512MB (what I used to test), becomes a 128MB.
A asymmetric 384MB double sided modules, with 256MB on one side and
128MB on the other. Becomes two sides with 128MB (a 256MB module).
This is also enabled in at least some BIOSs (GA-BXC).

The patch also cleans up some whitespace.

Signed-off-by: Anders Jenbo 
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Forgot to attach the actual patch...

Anders Jenbo