[coreboot] build service results for r5669

[Peter Stuge]

repository service wrote:
> Compilation of amd:rumba has been broken
> Compilation of lippert:frontrunner has been broken
> Compilation of olpc:btest has been broken
> Compilation of olpc:rev_a has been broken
> Compilation of wyse:s50 has been broken

It seems that src/cpu/amd/model_gx2/cache_as_ram.inc wasn't added, I
just committed it in r5670.


//Peter