sysmo-bts: Fix TCH/F activation
sysmo-bts: Fix TCH/F activation

osmocom/osmo-bts,tacooper/osmo-bts,shimaore/osmo-bts,shimaore/osmo-bts,osmocom/osmo-bts,geosphere/osmo-bts,telenoobie/osmo-bts,geosphere/osmo-bts,shimaore/osmo-bts,telenoobie/osmo-bts,shimaore/osmo-bts,geosphere/osmo-bts,osmocom/osmo-bts,tacooper/osmo-bts,telenoobie/osmo-bts,telenoobie/osmo-bts,geosphere/osmo-bts