Cummins BKI ECFG files — 1 versions for ISG12, CM2670 tuning definitions

Every Cummins BKI ECFG we hold: 1 software versions from 90.50.20.10 to 90.50.20.10 on CM2670 — ISG12, Heavy duty on-highway. Each version has its own page with the full header (module, build ID, interface level, boot loader range, parameter count).