drivers/elog: consolidate checks in elog_find_flash()

There were checks against global variables trying to determine
failing cases of elog_find_flash(). Instead move the checks
into elog_find_flash() and return value indicating failure.
A minimum 4KiB check was added to ensure the eventlog is at
least that size which makes the heuristic checks cleaner.

BUG=chrome-os-partner:55932

Change-Id: I4d9d13148555e05d4f217a10f995831a0e437fc3
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/16101
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

0 files changed, 0 insertions, 0 deletions