Tidy vboot2-specific libraries and tests

Most importantly, make a vboot 2.0 utility library, rather than just
tossing all the vboot2 files into the main utility library.  This will
allow creation of a vboot 2.1 library with overlapping symbol names.

BUG=chromium:423882
BRANCH=none
TEST=make runtests && VBOOT2=1 make runtests (works with/withoug VBOOT2 flag)
     And build firmware for veyron_pinky.

Change-Id: I514bda18cb0fa62bbc507251219b02054c447f3c
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/232753
1 file changed