Benjamin Berg authored Mar 07, 2019 and Thomas Haller committed Mar 07, 2019

nm_device_get_device_type would report the device type as it was send on
DBus, while fetching the property would mean that only a known device
types is reported.

Make both results consistent by coercing in nm_device_get_device_type
rather than when setting the property.

(cherry picked from commit a6a185ba)