guybrush: Set the correct GPIO number of EN_SPKR

The EN_SPKR is GPIO_70 on Nipperkin and Dewatt. And it's GPIO_31 on
Guybrush.

The devbeep worked before is because those GPIOs are enabled in
coreboot. We would like to disable them in order to save power.
Therefore, the fix in the depthcharge is required first.

BUG=b:223289882
TEST=Verified devbeep on Nipperkin, Guybrush and Dewatt
BRANCH=None

Change-Id: I999ecc53c075386422f0d8363c4f74db48da86d8
Signed-off-by: Yu-Hsuan Hsu <yuhsuan@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/depthcharge/+/3581738
Reviewed-by: Raul Rangel <rrangel@chromium.org>
3 files changed