Comment 31 for bug 1674509

note: this is without any overlay dtb loaded, using the standard Ubuntu Core config.txt

so we need the patched hciattach and a systemd unit that calls it like above to initialize the controller.

@konrad: can you include:

https://github.com/OpenELEC/OpenELEC.tv/blob/6b9e7aaba7b3f1e7b69c8deb1558ef652dd5b82d/packages/network/bluez/patches/bluez-07-broadcom-dont-set-speed-before-loading.patch

and change FIRMWARE_DIR to /lib/firmware in our build as a start ?