Qmi sim over mbim
This changes the mm-sim-qmi implementation to use the shared qmi interface instead of using the qmi broadband modem interface directly. This allows the usage of the UIM QMI interface from modems not beeing native QMI modems.
The mbim-broadband-modem can then use the UIM interface when supported, and is changed to do so.
Fixes #592 (closed)