Revert "board/zork: Remove BH720"

This reverts commit ca434375688b5d8049459ca5f871345bee9b1381.

Reason for revert: DUT can't boot from micro SD card in vilboz.

Original change's description:
> board/zork: Remove BH720
>
> We don't use the BH720 on the zork platform. This change reduces the
> boot time by 7ms.
>
> BUG=b:179303870
> BRANCH=zork
> TEST=boot on ezkinil
>
> Signed-off-by: Raul E Rangel <rrangel@chromium.org>
> Change-Id: I16afdef72f63e199a992185714db373fc4f625a8
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/depthcharge/+/2676806
> Reviewed-by: Mathew King <mathewk@chromium.org>
> Reviewed-by: Martin Roth <martinroth@google.com>

Bug=b:184794421

Bug: b:179303870
Change-Id: I4cb987ef0894db2852e43d78b7d9c58f5a332c32
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/depthcharge/+/2814060
Auto-Submit: John Su <john_su@compal.corp-partner.google.com>
Reviewed-by: Peichao Wang <pwang12@lenovo.corp-partner.google.com>
Reviewed-by: Kangheui Won <khwon@chromium.org>
Tested-by: John Su <john_su@compal.corp-partner.google.com>
Commit-Queue: Kangheui Won <khwon@chromium.org>
2 files changed