nat: Mention the the BSC the SCCP connection was on

The log message lacked a lot of context. A SCCP connection is
created on behalf of a configured BSC. This way we should be
able to always list this information.
1 file changed
tree: 68904dc4fc4e7965157dd8580a8b57bc067c42f7
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. README