mgcp: find better locations for LOGPCONN and LOGPENDP

The logging defines LOGPCONN and LOGPENDP are currently located in
mgcp_internal.h. However, there are specific header files for conn
(mgcp_conn.h) and endpoint (mgcp_endp.h) related stuff. Lets put LOGPCON
into mgcp_conn.h and LOGPENDP in mgcp_endp.h

Change-Id: I25ff37ee8108c27d169d294fd16ddcdde9b00195
diff --git a/include/osmocom/mgcp/mgcp_conn.h b/include/osmocom/mgcp/mgcp_conn.h
index b0978a6..f4e89f2 100644
--- a/include/osmocom/mgcp/mgcp_conn.h
+++ b/include/osmocom/mgcp/mgcp_conn.h
@@ -28,6 +28,11 @@
 #include <osmocom/core/rate_ctr.h>
 #include <inttypes.h>
 
+#define LOGPCONN(conn, cat, level, fmt, args...) \
+LOGPENDP((conn)->endp, cat, level, "CI:%s " fmt, \
+         (conn)->id, \
+         ## args)
+
 /* RTP connection related counters */
 enum {
 	IN_STREAM_ERR_TSTMP_CTR,