[M] Change in libosmocore[master]: LAPDm: Add an extra queue for UI frames

Attention is currently required from: jolly.

laforge has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmocore/+/34987?usp=email )

Change subject: LAPDm: Add an extra queue for UI frames ......................................................................

Patch Set 8:

(2 comments)

File include/osmocom/gsm/lapdm.h:

https://gerrit.osmocom.org/c/libosmocore/+/34987/comment/94492213_f093e230 PS8, Line 37: struct llist_head tx_ui_queue; /*!< UI frames to L1 */ TODO-RELEASE due to ABI breakage

File src/gsm/lapdm.c:

https://gerrit.osmocom.org/c/libosmocore/+/34987/comment/4d7929af_b1a62151 PS8, Line 295: while ((msg = msgb_dequeue(&dl->tx_ui_queue))) this function reimplements the msgb_queue_free() function which we already have in msgb.h of libosmocore. We should avoid duplicating code.