Change in coreboot[master]: elog: move functionality to commonlib/bsd

[Ricardo Quesada (Code Review)]

Attention is currently required from: Ricardo Quesada, Felix Held.
Hello build bot (Jenkins), Furquan Shaikh, Jack Rosenthal,

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

https://review.coreboot.org/c/coreboot/+/56985

to look at the new patch set (#6).

Change subject: elog: move functionality to commonlib/bsd
......................................................................

elog: move functionality to commonlib/bsd

This commit moves some drivers/elog/ functionality to commonlib/bsd
since they will be called from util/cbfstool/.

In particular:
 * elog_fill_timestamp(), elog_update_checksum(), elog_checksum_update()
   were moved to commonlib/bsd/elog
 * elog_fill_timestamp() receives the time parameters and updates the
   event based on the "time" arguments.

The original elog_*() functions were written by Duncan Laurie
(see CB:1311) and he gave permission to re-license the code to BSD.

BUG=b:172210863

Change-Id: I67d5ad6e7c4d486b3d4ebb25be77998173cee5a9
Signed-off-by: Ricardo Quesada 
---
M src/commonlib/bsd/elog.c
M src/commonlib/bsd/include/commonlib/bsd/elog.h
M src/drivers/elog/elog.c
3 files changed, 56 insertions(+), 55 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/85/56985/6