Change in coreboot[master]: lib: Add FIT payload support

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/25019 )

Change subject: lib: Add FIT payload support
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Patch Set 27:

Build Unstable

https://qa.coreboot.org/job/coreboot-gerrit/70762/ : UNSTABLE

https://qa.coreboot.org/job/coreboot-checkpatch/24970/ : SUCCESS