This is basically a trxcon that includes a transceiver, and can just
be used with existing and future apps supporting the trxcon interface,
i.e. mobile or ccch_scan.
Supports bladerf and uhd.
Currently using hardcoded sched/prios aimed at a setup with working,
reliable usb and reserved cores, for example a raspi 4 (ONLY 4, not 3,
not 2, not any other version)
Additionally builds test tools used for development: osmo-trx-syncthing*
see https://osmocom.org/projects/baseband/wiki/MS-side_GPRS for the
project description and details
Change-Id: I36c65a8c725c4da76dc70006cd96b0a2b6878e84
