drop duplicate ran_peer_find() vs ran_peer_find_by_addr()

This is the same function existing twice with different names. Keep only one.

Change-Id: If54b54fa61ece0f95564d403e1439fc5f5ededdf
diff --git a/include/osmocom/msc/ran_peer.h b/include/osmocom/msc/ran_peer.h
index 06ab500..bdca317 100644
--- a/include/osmocom/msc/ran_peer.h
+++ b/include/osmocom/msc/ran_peer.h
@@ -91,7 +91,7 @@
 };
 
 struct ran_peer *ran_peer_find_or_create(struct sccp_ran_inst *sri, const struct osmo_sccp_addr *peer_addr);
-struct ran_peer *ran_peer_find(struct sccp_ran_inst *sri, const struct osmo_sccp_addr *peer_addr);
+struct ran_peer *ran_peer_find_by_addr(struct sccp_ran_inst *sri, const struct osmo_sccp_addr *peer_addr);
 
 void ran_peer_cells_seen_add(struct ran_peer *ran_peer, const struct gsm0808_cell_id *id);
 
@@ -106,4 +106,3 @@
 
 struct ran_peer *ran_peer_find_by_cell_id(struct sccp_ran_inst *sri, const struct gsm0808_cell_id *cid,
 					  bool expecting_single_match);
-struct ran_peer *ran_peer_find_by_addr(struct sccp_ran_inst *sri, const struct osmo_sccp_addr *addr);