cosmetic: rename mgcp_release_endp to mgcp_endp_release

In order to allow clean prefixes for future endpoint related
functions the "rlease" should be moved to the end of the
function name.

- rename mgcp_release_endp to mgcp_endp_release

Change-Id: I22e938e702f57ad76d38c9f4a1370b110ac1ba11
diff --git a/src/libosmo-mgcp/mgcp_vty.c b/src/libosmo-mgcp/mgcp_vty.c
index 99780c8..5378931 100644
--- a/src/libosmo-mgcp/mgcp_vty.c
+++ b/src/libosmo-mgcp/mgcp_vty.c
@@ -1048,7 +1048,7 @@
 	}
 
 	endp = &trunk->endpoints[endp_no];
-	mgcp_release_endp(endp);
+	mgcp_endp_release(endp);
 	return CMD_SUCCESS;
 }