nat: Move the callstats to a new header file due sccp usage
The bsc_nat.h is included by common_vty.c so we may not used
sccp_types.h in the bsc_nat.h header file. Move the callstats
to a new file and include it where it is needed.
diff --git a/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c b/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
index 701cc72..c37daa7 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
@@ -43,6 +43,7 @@
*/
#include <openbsc/bsc_nat.h>
+#include <openbsc/bsc_nat_callstats.h>
#include <openbsc/bsc_nat_sccp.h>
#include <openbsc/gsm_data.h>
#include <openbsc/debug.h>