Add recovery reason for failure to correct TPM error

The TPM on snow devices may boot in an unusable state.  The workaround
is to detect this early and reboot.  The workaround code prevents
an infinite reboot loop by counting the number of reboots and entering
recovery mode with this reason after a small threshold has been reached.

BUG=chromium:156655
TEST=no test!  Not even compiled!
BRANCH=none

Change-Id: Ica2f14f8f7df8c46b7cbe5dbd578ba93c8f3a78c
Reviewed-on: https://gerrit.chromium.org/gerrit/36790
Tested-by: Luigi Semenzato <semenzato@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Ready: Luigi Semenzato <semenzato@chromium.org>
2 files changed