ipa: rename functions for consistency

As we are breaking builds by moving functions from libosmo-abis to
libosmocore anyway, we might as well give functions more appropriate
names.  ipaccess is a company, while IPA is the multiplex protocol, and
CCM is the protocol used for establishing identities on the IPA
multiplex.
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 50f5913..d82c8a0 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -246,5 +246,21 @@
 gan_msgt_vals;
 gan_pdisc_vals;
 
+ipa_ccm_rcvmsg_base;
+ipa_ccm_rcvmsg_bts_base;
+ipa_ccm_send_id_ack;
+ipa_ccm_send_id_req;
+ipa_ccm_send_pong;
+ipa_ccm_tlv_to_unitdata;
+ipa_ccm_idtag_name;
+ipa_ccm_idtag_parse;
+ipa_msg_alloc;
+ipa_msg_recv;
+ipa_msg_recv_buffered;
+ipa_parse_unitid;
+ipa_prepend_header;
+ipa_prepend_header_ext;
+ipa_send;
+
 local: *;
 };