fix compiler warnings with new libosmo-sccp: rename to osmo_sccp_*

See libosmo-sccp.git 1a3875092f93df3c3054d26eac52bb0ea9bd09c3

Note: at time of commit, osmo-iuh still depends on the libosmo-sccp sysmocom/iu
branch to build.

The same rename has been committed to both sysmocom/iu and master on
libosmo-sccp. Above commit hash is on sysmocom/iu. The master commit is
03ad002c28073b347b92bcde16d5af80a06389e4.

Change-Id: Id9c0065d7398a6205ff24477d47c9663caac669c
diff --git a/src/hnbgw.c b/src/hnbgw.c
index 103e29e..8608903 100644
--- a/src/hnbgw.c
+++ b/src/hnbgw.c
@@ -382,8 +382,8 @@
 
 int main(int argc, char **argv)
 {
-	struct osmo_sua_user *sua_user;
-	struct osmo_sua_link *sua_link;
+	struct osmo_sccp_user *sua_user;
+	struct osmo_sccp_link *sua_link;
 	struct osmo_stream_srv_link *srv;
 	int rc;