[WIP] libqmi-glib add MHI support

This series depends on mhi_uci kernel driver integration: https://lkml.org/lkml/2020/11/16/1458

mhi_uci is the Linux subsystem/driver exposing raw PCIe/MHI channels to userspace via character devices. This channels can serve as transport for various protocols, including QMUX, MBIM, etc...

Signed-off-by: Loic Poulain loic.poulain@linaro.org