chgstv2: Check current battery presence instead of battery_was_removed
chgstv2: Check current battery presence instead of battery_was_removed

Currently, charge_get_state checks battery_was_removed and returns
PWR_STATE_ERROR if it's set. battery_was_removed does not reflect the
current battery presence.

This patch makes charge_get_state check the current battery presence
(curr.batt.is_present).

Signed-off-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>

BUG=b:111969858
BRANCH=none
TEST=Boot Pantheon with/without a battery. Verify LED is on/off before and
after sysjump expectedly.

Change-Id: Id7a9d57b9b4040c488405fb2d0fec0da238eaefc
Reviewed-on: https://chromium-review.googlesource.com/1180350
Commit-Ready: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>
Tested-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>
Reviewed-by: Jett Rink <9d4aef0593e6843318d99df31597fb6153b89787@chromium.org>

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