iuup: Submit RNL-STATUS-Initialization.ind upon rx of Init

This allows init-passive users to get the configured sizes for the RFCIs
and other similar information once engotiated with the peer.

Realted: OS#1937
Change-Id: I63ee780b4aa162ea097410b234e73984000c0965
diff --git a/tests/iuup/iuup_test.ok b/tests/iuup/iuup_test.ok
index 5423096..681672b 100644
--- a/tests/iuup/iuup_test.ok
+++ b/tests/iuup/iuup_test.ok
@@ -36,6 +36,7 @@
 _init_ack_transport_prim_cb()
 Transport: DL len=35: 01 00 e3 ff 08 55 6d 94 4c 71 a1 a0 81 e7 ea d2 04 24 44 80 00 0e cd 82 b8 11 18 00 00 97 c4 79 4e 77 40 
 sys={0.000000}, clock_override_set
+_passive_init_user_prim_cb()
 _passive_init_transport_prim_cb()
 Transport: DL len=4: e4 00 24 00 
 _passive_init_user_prim_cb()