gsm_04_80: Require libosmocore for creating USSD messages
Use the libosmocore to create USSD messages, increase the
minimum version of libosmocore, add header files, remove
the code.
diff --git a/openbsc/src/gsm_04_08.c b/openbsc/src/gsm_04_08.c
index 2cd2a1f..ddda19b 100644
--- a/openbsc/src/gsm_04_08.c
+++ b/openbsc/src/gsm_04_08.c
@@ -53,6 +53,7 @@
#include <osmocore/bitvec.h>
#include <osmocore/gsm48.h>
+#include <osmocore/gsm0480.h>
#include <osmocore/gsm_utils.h>
#include <osmocore/msgb.h>
#include <osmocore/talloc.h>