Revert "smb328a_charger: Remove CHG_MODE_UNKNOWN"

This reverts commit c5c14083d88d5b04df07adbdec1ab2ab28b1f009.
Revert "sec_battery: Use AC charging for unknown cable types"

This reverts commit 0b160fae7bcdb5ceab40b7979c6693e7bc1e0d00.
Revert "drivers: power: Determine charge mode from actual cable type"

This reverts commit 4497d069d5b36389be50b4fcb11dad9dbb3c0571.