mosys: Add new elog message for Cr50 required reboot

Under some scenearios the key ladder on the Cr50 can get disabled.  If
this state is detected, trigger a reboot of the Cr50 to restore full
TPM functionality.  This change adds a new elog message to track this
behavior.

Related coreboot change:
https://review.coreboot.org/c/coreboot/+/31260

BUG=b:121463033
BRANCH=none
TEST=Built mosys on sarien platform.
TEST=Ran 'gsctool -a -m disable' and reboot. Verfied the Cr50 performs
and extra reboot and verified the new elog type is displayed in the
event log.
Tested-by: Keith Short <keithshort@chromium.org>

Change-Id: I8498a81f65dcef3c7fa8f2e8d01cff682cc008b0
Signed-off-by: Keith Short <keithshort@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1465019
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
2 files changed