brya: add initial board config

BUG=b:176186750
TEST=emerge-brya chromeos-bmpblk libpayload

Cq-Depend: chromium:2614208
Change-Id: I44973e52fff3ac01e208d6692e77131c07ab068f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2614209
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Tested-by: YH Lin <yueherngl@chromium.org>
Commit-Queue: YH Lin <yueherngl@chromium.org>
2 files changed