zephyr: volteer: Enable battery cut-off
zephyr: volteer: Enable battery cut-off

Battery cut-off was disabled because it caused problems when the battery
capacity reached 99%. Battery cut-off is no longer causing any charging
issues.

BUG=b:179393708
BRANCH=none
TEST=Discharge battery to 90%, charge to 100% successfully
TEST=Run `ectool batterycutoff`, verify battery cutsoff

Signed-off-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>
Change-Id: Ied8fa9478ff0360f4077225317d8ae4ad69598d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2756968
Reviewed-by: Simon Glass <c00b0378376498bd9cd974c388df8854c0131d27@chromium.org>
Commit-Queue: Simon Glass <c00b0378376498bd9cd974c388df8854c0131d27@chromium.org>

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