Fix build of bsc-nat and GPRS code after include path change
The last patch changed the osmocore include paths, this fixes some build
problems caused by it
diff --git a/openbsc/src/gprs/gprs_llc_vty.c b/openbsc/src/gprs/gprs_llc_vty.c
index 050d024..ab52699 100644
--- a/openbsc/src/gprs/gprs_llc_vty.c
+++ b/openbsc/src/gprs/gprs_llc_vty.c
@@ -28,7 +28,7 @@
#include <openbsc/gsm_data.h>
#include <osmocom/core/msgb.h>
-#include <osmocom/core/tlv.h>
+#include <osmocom/gsm/tlv.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/select.h>
#include <osmocom/core/rate_ctr.h>