asurada: Ensure unused pins aren't floating to save power
asurada: Ensure unused pins aren't floating to save power

BUG=b:173490375
BRANCH=none
TEST=save ~2mw on asurada.

Signed-off-by: Dino Li <338d523ecf3700bd86eb9c34d220f91911d2a18c@ite.com.tw>
Change-Id: I839e4b19b1c82583ae1c60ea2d6a463806bf4937
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2545917
Reviewed-by: Ayo Wu <b10f6385124610e90dc8d1e0bec4988d7b599771@google.com>
Reviewed-by: Eric Yilun Lin <2f2733c7206ea2b76bd2db1905cc5e8a75841c48@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec