I've updated Haswell NRI (native raminit) patches in Libreboot for ThinkPad T440p/W541, and added 9020 SFF/MT configs using it.
NRI replaces MRC; MRC is a blob from Intel for raminit. Libre code (NRI) is available from Angel Pons, replacing it; not all training steps done but it works well enough in my testing.
Angel updated it, fixing S3 suspend/resume. It's now in Libreboot. See:
https://browse.libreboot.org/lbmk.git/commit/?id=9e3b217cfdce5e32c6c6d6e1c79786555ee4eb1c
https://browse.libreboot.org/lbmk.git/commit/?id=ac7ce93005ca7d8eccec5052d2e459514af70f39
https://browse.libreboot.org/lbmk.git/commit/?id=c557e9e0e10c7661f40c5fd47c8e3b514e1f6562
https://browse.libreboot.org/lbmk.git/commit/?id=523f1df9bf0fbb13ca8124bf0cf692700bbb94da
Pretty cool!