mgcp: move misplaced include

mgcp.h includes mgcp_ep.h but does not use anything from it. This
does not hurt the mgcp code internally, but when mgcp.h is included
by an application compilation fails because mgcp_ep.h is not
installed.

remove mgcp_ep.h from include list in mgcp.h

add mgcp_ep.h to include list in mgcp_conn.c where it is needed.

Change-Id: Ib58a8ed64f729055282c2b9673f7684cdfdb5936
diff --git a/src/libosmo-mgcp/mgcp_conn.c b/src/libosmo-mgcp/mgcp_conn.c
index 0da62bc..e0eec63 100644
--- a/src/libosmo-mgcp/mgcp_conn.c
+++ b/src/libosmo-mgcp/mgcp_conn.c
@@ -24,6 +24,7 @@
 #include <osmocom/mgcp/mgcp_conn.h>
 #include <osmocom/mgcp/mgcp_internal.h>
 #include <osmocom/mgcp/mgcp_common.h>
+#include <osmocom/mgcp/mgcp_ep.h>
 
 /* Reset codec state and free memory */
 static void mgcp_rtp_codec_reset(struct mgcp_rtp_codec *codec)