flash: Introduce 4BA shorthands

Backport some of the more trivial side of the upstream
`commit aac81424eb`. The more semantical changes are dealt
with in follow ups as dep are missing as of now.

BUG=chromium:478356
BRANCH=none
TEST=still builds

Change-Id: I4ec0c6343a143bef00d7fbb427867dbc17dc8583
Signed-off-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/flashrom/+/1672909
Reviewed-by: Sam McNally <sammc@chromium.org>
4 files changed