vboot: Convert reboot-related errors to vboot2-style

Error codes are renamed as follows:

 VBERROR_SHUTDOWN_REQUESTED
 --> VB2_REQUEST_SHUTDOWN

 VBERROR_REBOOT_REQUIRED
 --> VB2_REQUEST_REBOOT

 VBERROR_EC_REBOOT_TO_SWITCH_RW
 --> VB2_REQUEST_REBOOT_EC_SWITCH_RW

 VBERROR_EC_REBOOT_TO_RO_REQUIRED
 --> VB2_REQUEST_REBOOT_EC_TO_RO

 VBERROR_KEEP_LOOPING
 --> VB2_REQUEST_UI_CONTINUE

Since these are not really "errors", they're renamed to VB2_REQUEST_*
instead, with larger values to separate from real errors.

The old vboot1-style errors will be removed once the errors are renamed
in coreboot and depthcharge.

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

Change-Id: Ide1328f9c0f2803534fb3f1f1ecd16ad8ea36a4e
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2143030
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Joel Kitching <kitching@chromium.org>
14 files changed