Revert "fastchg: Only enable fast charge GPIO as long as we actually have some charging to do."

This reverts commit 8bde97359a2090fb331728b7d50f7418ace72ea9.
Revert "fastchg: Remove vestigial fsa9480 "force AC" switch."

This reverts commit 1fac259ac09287245fd6bb5c815f19c71e9aac49.
Revert "fastchg: change fast charge to override the high current GPIO, not the USB cable mode"

This reverts commit 8c96e0a84cdb5e1a50ccfc23f3b7607319235247.
Kernel Version: AK.256.SKL