src/security/tpm: query recovery mode from Cr50
On the Sarien/Arcada platforms, the EC is not trusted to provide
the state of the ESC+REFRESH+PWR recovery combination. On these
platforms the Cr50 latches the state of REFRESH+PWR for use as the
recovery mode key combination.
BUG=b:
122715254
BRANCH=none
TEST=Verify recovery mode screen shown after pressing REFRESH+PWR
Signed-off-by: Keith Short <keithshort@chromium.org>
Change-Id: Ie3ce519956f916023c8c52f1d11fa93331f52f3c
Reviewed-on: https://review.coreboot.org/c/30929
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>