[gprs] pass BSSGP UL-UNITDATA Cell ID up into GMM layer

BSSGP stores a pointer to the Cell Identifier IE in msgb->cb, which
is later used by the GMM layer to identify the cell that has sent a
given message.

This now also means that the gsm_04_08_gprs.c code is free of any
legacy references to msg->trx or struct gsm_bts.
5 files changed
tree: 9cb849299ab0f0ee9a1e76fea46f0df2eb116a83
  1. hlrsync/
  2. libosmocore/
  3. linux-kernel/
  4. openbsc/
  5. rrlp-ephemeris/
  6. wireshark/