A switch (bool) is used to enable or disable NSVC 0 or 1. It is enabled
via any "gprs nsvc 0|1" command and disabled via "no gprs nsvc 0|1"
command. If it is disabled, it is treated as unconfigured, similar when
no remote IP or port has been defined.
Related: OS#6006
Change-Id: Ia112e86aa35f6a245d98ef1b3720c18835faeda6
The only real 1-1 relationship between BTS NM objects is the one between
GPRS Cell and BTS (which is actually a BTS cell).
In our current osmo-bts implementation we don't care much since we only
handle 1-cell BTSses, but let's make the data structure organization
more generic.
Implementation notes:
The gsm_bts_sm is moved to its own file, APIs to allocate are added and
the new public object is hooked correctly in the allocation process of
osmo-bsc.
Change-Id: I06461b7784fa2a78de37383406e35beae85fbad8