[M] Change in osmo-iuh[master]: iu_client: refactor LAC/RAC handling

lynxis lazus has posted comments on this change by lynxis lazus. ( https://gerrit.osmocom.org/c/osmo-iuh/+/38945?usp=email )

Change subject: iu_client: refactor LAC/RAC handling ......................................................................

Patch Set 2:

(1 comment)

This change is ready for review.

Commit Message:

https://gerrit.osmocom.org/c/osmo-iuh/+/38945/comment/21a8fd25_c16c7edd?usp=... : PS2, Line 13: The old gprs_ra_id is still used to contain api stability. should I break API here? So far we know it is only used by osmo-sgsn and also there it would better to use the new osmo_routing_area_id