security/vboot: Add timestamps when loading verstage
We are not currently tracking how long it takes to load verstage. The
enum values already exist, they just weren't used.
BUG=b:
179092979
TEST=Dump timestamps
501:starting to load verstage 2,280,656 (1)
502:finished loading verstage 2,340,845 (60,189)
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I2cde58cb8aa796829a4e054e6925e2394973484b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55370
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>