vboot: standardize on "keyblock" as one word

Stardardize on inconsistency between "keyblock" and "key block"
both in code, comments, and textual output.

BUG=b:124141368, chromium:968464
TEST=make clean && make runtests
BRANCH=none

Change-Id: Ib8819a2426c1179286663f21f0d254f3de9d94a4
Signed-off-by: Joel Kitching <kitching@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1786385
Tested-by: Joel Kitching <kitching@chromium.org>
Reviewed-by: Joel Kitching <kitching@chromium.org>
Commit-Queue: Joel Kitching <kitching@chromium.org>
37 files changed