[coreboot] Disabling Intel ME 11 via undocumented mode

[Felix Held]

> And so far, nobody was able to crack Huffman, thus to have ability to 
> reverse-engineer plain kernel executable.

Not true. See 
http://blog.ptsecurity.com/2017/12/huffman-tables-intel-me.html , 
https://github.com/ptresearch/unME11 and 
https://github.com/IllegalArgument/Huffman11

Regards
Felix