modem-manager: Detect presence of modem-power driver
modem-manager: Detect presence of modem-power driver

Quectel EG25-G modem in the Pine64 PinePhone and PinePhone Pro can be
booted with the eg25-manager (user space) or modem-power (kernel space).

We only support the eg25-manager for upgrading these modems.

Based on a patch by Dylan Van Assche <me@dylanvanassche.be>, thanks.

fwupd/fwupd,fwupd/fwupd,fwupd/fwupd,fwupd/fwupd