prototype: Add soc contraint

BUG=None
TEST=None

Change-Id: I6a5fec82f9f72b4353d0857dbfa231c99843ba22
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/1940299
Reviewed-by: C Shapiro <shapiroc@chromium.org>
Commit-Queue: C Shapiro <shapiroc@chromium.org>
Tested-by: C Shapiro <shapiroc@chromium.org>
Auto-Submit: C Shapiro <shapiroc@chromium.org>
3 files changed