costmetic: Document gsm48_multirate_config() + const-ify input

We generally use const pointers for input arguments.  Also, document
input/output arguments of function and add spec reference.

Change-Id: I2532cde69a18e3b021f7371e68f67a28a43d8b5f
2 files changed
tree: 65e89e4d11fc1bfd02960f95b2e04d1a7c8ba40e
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore
  5. .gitreview
  6. .mailmap