bts: Adjust to VTY text change

In osmo-bts Change-Id If53fb07ec38f6bbc368ce84d14e59fa8167691d3
unfortunately the wording / syntax of the VTY was changed.  Let's
adjust to the new wording.

Change-Id: I4a6d37febde104e70ce03992b7e2e8fb793b5a00
1 file changed