vboot2: move firmware hash tags to their own header file

And add a few hash tag types we'll be supporting soon.

No functional changes; just moving an enum from one header to another.

BUG=chromium:423882
BRANCH=none
TEST=VBOOT2=1 make runtests

Change-Id: I6f0fa54ee85fd857c4037856b81e2159e92f1ea9
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/223532
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
2 files changed