There are situations where usb-moded needs to behave in slightly different
manner depending on whether it is executed as a part of device starup
sequence or (restarted) after the device is already fully booted up.

Make the related init-done functions available to all modules within
usb-moded source tree.
Signed-off-by: Simo Piiroinen <simo.piiroinen@jollamobile.com>