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

Make all changes to #include statements and build files.
diff --git a/src/hnbap/IE.c b/src/hnbap/IE.c
index fc9c45e..5e6763a 100644
--- a/src/hnbap/IE.c
+++ b/src/hnbap/IE.c
@@ -5,7 +5,7 @@
  * 	`asn1c -gen-PER`
  */
 
-#include <osmocom/osmo-iuh/hnbap/IE.h>
+#include <osmocom/hnbap/IE.h>
 
 static asn_TYPE_member_t asn_MBR_IE_1[] = {
 	{ ATF_NOFLAGS, 0, offsetof(struct IE, id),