move gsm_bts_num() to gsm_data_shared.[ch]

this way we can drop a copy of this function from osmo-bts.
4 files changed
tree: b30c31bbe5b1f3641d5032dd7869234e19615c7e
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. README