zoombini: Reject chg port none w/ critical batt.

In the event where we don't have a battery, or the battery is criticial,
we should reject the charge port of "none" such that we don't stop
charging.

BUG=b:66516888
BRANCH=None
TEST=Flash zoombini; Unplug battery, plug in a Type-C charger, verify
that board doesn't enter a reboot loop.
TEST=Repeat the above test with all Type-C ports.

Change-Id: I794e370d5ba578adb76b3fb6edddb82ab72578bb
Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Reviewed-on: https://chromium-review.googlesource.com/678836
Commit-Ready: Aseda Aboagye <aaboagye@chromium.org>
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed