gsm0808_utils: Add gsm0808_decode_cell_id_u()
This function parses a single Cell ID list element into a
'union gsm0808_cell_id_u'. This function is going to be used
by the upcoming CBSP support.
Related: OS#3537
Change-Id: I08b33881667aa32f01e53ccb70d44d5b79c7c986
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index d49401d..9aa9683 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -244,6 +244,7 @@
gsm0808_enc_lcls;
gsm0808_dec_lcls;
gsm0808_msgb_put_cell_id_u;
+gsm0808_decode_cell_id_u;
gsm29118_msgb_alloc;
gsm29118_create_alert_req;