virt-nitb: tweaks

Change-Id: Icba4b16e25db93ba9d069388bbe39cd5adfed770
diff --git a/virt-nitb/osmo-bsc.cfg b/virt-nitb/osmo-bsc.cfg
index a9528d9..bd674e7 100644
--- a/virt-nitb/osmo-bsc.cfg
+++ b/virt-nitb/osmo-bsc.cfg
@@ -24,7 +24,7 @@
   location_area_code 23
   cell_identity 0
   base_station_id_code 0
-  codec-support fr amr
+  codec-support fr hr efr amr
   amr tch-f modes 2 3 5 7
   amr tch-f start-mode 2
   amr tch-h modes 2 3 5