vboot: use vb2_crc8 instead of Crc8

No need to have two implementations of this now.

BUG=chromium:611535
BRANCH=none
TEST=make runtests; emerge-kevin coreboot depthcharge

Change-Id: Id3348eae80c5d85451981a44729164ff59f88648
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/399121
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
6 files changed