Add logging of chipset events on boot into the flash event log.
This was tested on a google/sarien board to ensure that events
like "System Reset" are added to the log as expected.
Change-Id: I38498cef36d8cc9c8a1f63d12618ea768b65254c
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/c/30718
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>