Your guy Stefan is here, asking for a help. Stefan got the straight answer: FSP/Coreboot (intermingled), then U_Boot as payload... You got that?
Stefan got a suggestion from me that running u-boot as a coreboot payload might be easier, as it insulates u-boot from having to deal with FSP. I also commented that I had no complaint with them running without coreboot, since the more open source firmware we have the better. Either path is fine, whatever works best for u-boot.
I don't understand your note at all Zoran, but I am not alone it seems.
ron