Missing Bay Trail documents pointed in FSP release notes

Hi all,

I'm reading through Bay Trail FSP release notes: https://github.com/IntelFsp/FSP/blob/BayTrail/BayTrailFspBinPkg/Docs/BayTrailFspReleaseNotes.pdf

FSP/BayTrailFspReleaseNotes.pdf at BayTrail · IntelFsp/FSP · GitHub

and cannot find mentioned files README.coreboot_secureboot.txt and

#558081_Enabling_Secure_Boot_with_Intel_FSP_and_coreboot_for_Intel_Atom_Processor_E3800_Product_Family_Implementation_Guide-Rev-1.0.pdf.

I tried google and RDC, but those seem to not be available. Can you point me to those documents or if those are outdated to new one that can apply to Bay Trail platform ?

Best Regards