vty: Permit codec-list containing both full-rate and half-rate codecs

Once upon a time, in the old osmo-bsc-sccplite, there was a restriction
of not being able to handle configurations with both TCH/F and TCH/H
type codecs.  This time is long gone, so let's remove this constraint.

Change-Id: Iba0822f57c41cedeeb7f069be540f3a851752a23
Closes: OS#2763
1 file changed