For example pinephone exposes charger devices in a manner where the
name is prefixed with chiptype (e.g. "axp813-ac" / "axp20x-usb").
As mce does not recognize these, both wall charger and pc connection
gets treated as "other" type charger - which works to some extent but
triggers incorrect UI actions.

If direct match for power supply device type / name is not found, try
to eliminate chipname prefix so that for example names such as
"axp20x-usb" get treated as plain "usb".

To future proof things, make it possible to override build-in
defaults and heuristics via mce configuration files.
Signed-off-by: Simo Piiroinen <simo.piiroinen@jollamobile.com>