elanmoc: Implement suspend/resume support
With !270 (closed), it is now possible to support verifying/identifying for a long period of time, including while the laptop is suspended. libfprint will correctly configure USB wakeup when needed.
In general, all that is needed should be implementing suspend and resume methods that stop/start the urbs to query the device state. You can use the new fpi_device_critical_enter and fpi_device_critical_leave to ensure the driver is in the correct state to suspend/resume.
An working example is the synaptics driver, see:
If you have any questions, please ping me. This is relatively low-priority for now, as it requires more changes in gnome-shell, GDM and fprintd to work correctly.
CC: @hermanlin, @ArronYen