Having:
osmo-bts requires sysmobts-firmware > 3.11
sysmobts-firmware requires osmo-bts > 0.4.2
is something opkg can't resolve in one go. One needs two calls to
the opkg command to end up with a fully upgraded version. Make sure
that we require/pull newer firmware when installing a new version
of osmo-bts.
* Add sysmobts-firmware 3.11. The firmware will work with the
previous osmo-bts software and this one (as we don't use the
new primitives)
* Build newer version of osmo-bts with support for online
calibration and CMR fixes.