Revert "osmo-bts-trx config: remove settsc"

According to pespin, this makes all osmo-bts-trx test runs fail.
We will still figure out the details, but for the time being
let's go with the known working config.

This reverts commit 72ded64705a85df362f918879ddc075d1a0191fe.

Change-Id: I57a3db0d060203ad6540c9a3cc7735e273ee0048
diff --git a/src/osmo_gsm_tester/templates/osmo-bts-trx.cfg.tmpl b/src/osmo_gsm_tester/templates/osmo-bts-trx.cfg.tmpl
index c82f367..452b920 100644
--- a/src/osmo_gsm_tester/templates/osmo-bts-trx.cfg.tmpl
+++ b/src/osmo_gsm_tester/templates/osmo-bts-trx.cfg.tmpl
@@ -20,6 +20,7 @@
  band ${osmo_bts_trx.band}
  ipa unit-id ${osmo_bts_trx.ipa_unit_id} 0
  oml remote-ip ${osmo_bts_trx.oml_remote_ip}
+ settsc
  gsmtap-sapi bcch
  gsmtap-sapi ccch
  gsmtap-sapi rach