Add 9020 SFF/MT configs using native raminit

Angel's code was rebased for coreboot/default, so it's now
feasible to have NRI configs for these.

NRI is incomplete, because some training steps are still not
implemented and S3 is not yet supported, so Libreboot still
provides the MRC setups as default options, but the NRI is
nicer to use if it works for you (and you don't need S3).

In Libreboot the policy is always: use fewer blobs if possible.

Signed-off-by: Leah Rowe <leah@libreboot.org>