osmocom: Use CONFFILES for cfg files

Change-Id: I4a4c7d4a5e3e58c413c82b75f442ae9321d64998
diff --git a/recipes-osmocom/osmo-iuh/osmo-iuh.inc b/recipes-osmocom/osmo-iuh/osmo-iuh.inc
index a5f1cbc..2737412 100644
--- a/recipes-osmocom/osmo-iuh/osmo-iuh.inc
+++ b/recipes-osmocom/osmo-iuh/osmo-iuh.inc
@@ -5,7 +5,7 @@
 
 DEPENDS = "libosmocore libosmo-netif libosmo-sccp libasn1c"
 
-INC_PR="r1.${META_TELEPHONY_OSMO_INC}"
+INC_PR="r2.${META_TELEPHONY_OSMO_INC}"
 
 inherit autotools pkgconfig systemd
 
@@ -35,5 +35,6 @@
 		${bindir}/osmo-hnbgw \
 		${sysconfdir}/osmocom/osmo-hnbgw.cfg \
 		"
+CONFFILES_osmo-hnbgw = "${sysconfdir}/osmocom/osmo-hnbgw.cfg"
 
 ALLOW_EMPTY_${PN} = "1"