Announce IuFP audio codec for UTRAN conns in CRCX towards MGW

This way the MGW knows it has to handle IuUP in that connection (answer
IuUP Initialization, etc.).

Depends: osmo-mgw.git 1de5ed6f979bd4c1380789c9a82f8e396f05c5f8
Change-Id: I7aca671e00ed27ac03f0d106b5a6b665a9bed4c1
3 files changed