This will prevent earlier released images from running on the device
unless Info1 is erased.
BRANCH=cr50, cr50-mp
BUG=b:70891959
TEST=verified that two bits in the rollback mask have been erased now:
> sysinfo
Reset flags: 0x00000800 (hard)
[...]
Rollback: 2/2/128
Change-Id: Ic345c79010fbe0e075e14e652ea1eba263226ab1
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/916737
Reviewed-by: Mary Ruthven <mruthven@chromium.org>