libcommon-cs: move vty bits to libbsc/bsc_vty.c

The gsm_network VTY was partly shared between libmsc and libbsc in the old
openbsc.git; now osmo-bsc.git has its own copy, so merge all of it into
bsc_vty.c.

This leaves common_cs_vty.c practically empty; leave removal of the file to
later, when we drop the entire libcommon-cs in
I07d4a48af3154ee4d904686f230a51b8b8a94ff9.

Note that gsmnet_from_vty() is also already declared in bsc/vty.h.

Change-Id: I6f3a596f31762b48afed39a85a343c400826300f
3 files changed