System76 EC firmware supports setting charging thresholds for a single battery. Change-Id: I3d656291c096f320d469274677e9fe6c74819d25 Signed-off-by: Tim Crawford <tcrawford@system76.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/45532 Reviewed-by: Jeremy Soller <jeremy@system76.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>