mncc: Move the cc_tx_to_mncc code into the libbsc.a

The trau_mux likes to call cc_tx_to_mncc for each received
frame from the E1 link. Using a signal for each audio frame
is messy as well. The best thing I could think of is to put
this into the BSC to deref the pointer. The other option would
be to include the gsm_data.h in the mncc.h header and have
the method as inline.
diff --git a/openbsc/src/mncc_upqueue.c b/openbsc/src/mncc_upqueue.c
new file mode 100644
index 0000000..126072b
--- /dev/null
+++ b/openbsc/src/mncc_upqueue.c
@@ -0,0 +1,27 @@
+/* mncc_upqueue.c - Pass msgb's up the chain */
+
+/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <openbsc/mncc.h>
+#include <openbsc/gsm_data.h>
+
+void cc_tx_to_mncc(struct gsm_network *net, struct msgb *msg)
+{
+	net->mncc_recv(net, msg);
+}