lib: add region file support

The region file library is added to provide the underpinnings for
other libraries that support appending updates when the data changes.
The most recent written data is deemed the latest data associated
with that "file". A good example is the MRC cache which in a follow-up
patch utilizes this library.

BUG=chrome-os-partner:56151

Change-Id: Ic3caf1edbb6f11dbbe27181a87b7b19d1224fffa
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/17713
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>

0 files changed, 0 insertions, 0 deletions