lapd/lapdm: print user-defined string name instead of (dl=%p)

At the moment we print the pointer address to identify the log lines
belonging to a specific connection. Since pointer addresses are
difficult to work with, a human readable ID should be printed instead.

e.g. "This is LAPD instance for SAPI3 on bts0/trx1/ts5/lchan3"

Change-Id: Ie6742843fff809edffcac24c4dce4edf66bc71be
Closes: OS#1938
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 2000e6c..2837aa5 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -456,6 +456,8 @@
 
 lapd_dl_exit;
 lapd_dl_init;
+lapd_dl_init2;
+lapd_dl_set_name;
 lapd_dl_reset;
 lapd_msgb_alloc;
 lapd_ph_data_ind;
@@ -466,6 +468,7 @@
 lapdm_channel_exit;
 lapdm_channel_init;
 lapdm_channel_init2;
+lapdm_channel_init3;
 lapdm_channel_reset;
 lapdm_channel_set_flags;
 lapdm_channel_set_l1;
@@ -475,6 +478,7 @@
 lapdm_entity_exit;
 lapdm_entity_init;
 lapdm_entity_init2;
+lapdm_entity_init3;
 lapdm_entity_reset;
 lapdm_entity_set_flags;
 lapdm_entity_set_mode;