cosmetic: gsm_data.h, README: rename CSCN to MSC

We're discarding the name OsmoCSCN for the benefit of OsmoMSC. But "CSCN" has
already crept into the master branch in two places; apply the rename.

See OS#1958

Change-Id: Ib4274eb3c172ada1fe7f05746740b456370bc93d
2 files changed
tree: 74147f8f092d3f93f7fb51f7d7d48c12c62edf61
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore
  5. .gitreview
  6. .mailmap