Adding LLC-XID related modifications in LLC

With this commit the already existing XID mechanism has been
modified to suit the needs for the upcomming SNDCP-XID patches.

This commit should not break anything since it does not alter
the current behaviour (incoming XID is still just echoed, on
GMM-Reset a basic XID message is still echoed)

Change-Id: I65b9d625e72d3d61c99abdc7041773701d694d52
3 files changed
tree: 61d1812168b7b3fac09fe6b12031078a45ece49f
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore
  5. .gitreview
  6. .mailmap