[coreboot] IBM x60t test - DSDT is in fact incomplete

[Vladimir 'φ-coder/phcoder' Serbinenko]

>> Ideally, the DSDT should be fixed within coreboot, but this goes beyond
>> my present abilities.
> Not true. Just do the same changes to the corresponding *.asl files in
> coreboot repo and send the patch to gerrit. Other than a layer of
> preprocessing, it's exactly the same code as you got from disassembly.
> 
Sorry, I misread you. I thought that you extracted coreboot DSDT from
running system then patched it and used as custom DSDT. I'm going to
make few experiments on my x220t.