Implement _BIX method to expose battery cycle count.
Requires an EC version with support for cycle count.
Change-Id: I5f7a1d275caff59960aaf9c39b9c707970350987
Signed-off-by: Ian Douglas Scott <idscott@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57678
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jeremy Soller <jeremy@system76.com>