hwid: Change !region to use it own numeric mapping.

Per offline discussion we believe there is no need to maintain original
mapping in selective region tag because
 - That was not really requested before.
 - Maintaining values means HWID config must increase reserved region
   field length, which also makes it incompatible.

TEST=make test

Change-Id: Ia2d1f2ebb7382a869513d845e66ef1af4804b57e
Original-Reviewed-On: https://chromium-review.googlesource.com/368501
Original-Change-Id: Ie5f581f31cc8b6392465f84941ec73937805e5be
Reviewed-on: https://chromium-review.googlesource.com/368563
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Commit-Queue: Hung-Te Lin <hungte@chromium.org>
Tested-by: Hung-Te Lin <hungte@chromium.org>
1 file changed