While usb-moded correctly goes to charging-only mode when/if it sees
power supply type go through USB_DCP -> USB_HVDCP, it still complains
about unhandled USB_HVDCP type.

Explicitly treat receiving of high voltage dedicated charger profile
events as a charger connection.
Signed-off-by: Simo Piiroinen <simo.piiroinen@jollamobile.com>