Introduce gsm48_lchan2chan_desc_as_configured()

gsm48_lchan2chan_desc_as_configured() is similar to gsm48_lchan2chan_desc(),
but uses the *configured* channel combination, rather than the currently
active one.

Change-Id: Id4043218fb770e8420f19a4ef9428680ecdfd286
Related: OS#3532
2 files changed