eldrid: turn off BAT LED when plug out AC
eldrid: turn off BAT LED when plug out AC

BUG=b:173476755
BRANCH=firmware-volteer-13521.B-master
TEST=make buildall
TEST=Plug out ac on left port, right port won't turn on

Signed-off-by: Scott Chao <8cefa9751fac9aaa897ba1213763a96ba8dbd20d@wistron.corp-partner.google.com>
Change-Id: I8b562d02354758e90cb99d99084d4b1c95f1ce18
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2547605
Reviewed-by: Abe Levkoy <2e1ad7039298f93262cf06bbb457275fb3e2ecb5@chromium.org>

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