Change in coreboot[master]: libpayload: Implement new CBFS access API

[Jakub Czapiga (Code Review)]

Attention is currently required from: Paul Menzel, Julius Werner.
Hello build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/59497

to look at the new patch set (#16).

Change subject: libpayload: Implement new CBFS access API
......................................................................

libpayload: Implement new CBFS access API

This commit adds new CBFS API, which is based on the one available in
the main coreboot source tree. Libpayload implementation supports RO/RW
file lookups and file contents verification.

Change-Id: I00da0658dbac0cddf92ad55611def947932d23c7
Signed-off-by: Jakub Czapiga 
---
M payloads/libpayload/Kconfig
M payloads/libpayload/Makefile.inc
M payloads/libpayload/include/cbfs.h
M payloads/libpayload/include/cbfs_core.h
A payloads/libpayload/include/cbfs_glue.h
A payloads/libpayload/include/cbfs_legacy.h
A payloads/libpayload/libcbfs/Kconfig
M payloads/libpayload/libcbfs/Makefile.inc
M payloads/libpayload/libcbfs/cbfs.c
M payloads/libpayload/libcbfs/cbfs_core.c
A payloads/libpayload/libcbfs/cbfs_legacy.c
M payloads/libpayload/tests/Makefile.inc
A payloads/libpayload/tests/include/mocks/cbfs_util.h
A payloads/libpayload/tests/libcbfs/Makefile.inc
A payloads/libpayload/tests/libcbfs/cbfs-lookup-test.c
A payloads/libpayload/tests/libcbfs/cbfs-verification-test.c
A payloads/libpayload/tests/mocks/cbfs_file_mock.c
A payloads/libpayload/tests/mocks/die.c
18 files changed, 1,815 insertions(+), 437 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/97/59497/16