Remove osmo-iuh subdir level from include/ (2/2)

Make all changes to #include statements and build files.
diff --git a/src/ranap/RANAP_Offload-RAB-Parameters-APN.c b/src/ranap/RANAP_Offload-RAB-Parameters-APN.c
index f515e7d..46d9e96 100644
--- a/src/ranap/RANAP_Offload-RAB-Parameters-APN.c
+++ b/src/ranap/RANAP_Offload-RAB-Parameters-APN.c
@@ -4,7 +4,7 @@
  * 	found in "../../asn1/ranap/RANAP-IEs.asn"
  */
 
-#include <osmocom/osmo-iuh/ranap/RANAP_Offload-RAB-Parameters-APN.h>
+#include <osmocom/ranap/RANAP_Offload-RAB-Parameters-APN.h>
 
 int
 RANAP_Offload_RAB_Parameters_APN_constraint(asn_TYPE_descriptor_t *td, const void *sptr,