vboot: Remove reboot-related vboot1-style errors

BRANCH=none
BUG=b:124141368, chromium:988410
TEST=make runtests

Cq-Depend: chromium:2154269, chromium:2175864
Change-Id: Ib3996ecc83a69ce6780d48f1aa446e81dfd75589
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2167622
Reviewed-by: Joel Kitching <kitching@chromium.org>
1 file changed