osmocom: Use CONFFILES for cfg files

Change-Id: I4a4c7d4a5e3e58c413c82b75f442ae9321d64998
diff --git a/recipes-osmocom/osmo-sgsn/osmo-sgsn.inc b/recipes-osmocom/osmo-sgsn/osmo-sgsn.inc
index 74a6bd4..8ed6a10 100644
--- a/recipes-osmocom/osmo-sgsn/osmo-sgsn.inc
+++ b/recipes-osmocom/osmo-sgsn/osmo-sgsn.inc
@@ -5,7 +5,7 @@
 
 DEPENDS = "c-ares libpcap libosmocore libosmo-netif libosmo-sccp osmo-ggsn"
 
-INC_PR="r3.${META_TELEPHONY_OSMO_INC}"
+INC_PR="r4.${META_TELEPHONY_OSMO_INC}"
 
 inherit autotools pkgconfig systemd
 
@@ -29,15 +29,19 @@
 SYSTEMD_SERVICE_osmo-sgsn = "osmo-sgsn.service"
 SYSTEMD_SERVICE_osmo-gbproxy = "osmo-gbproxy.service"
 
+CONFFILES_osmo-sgsn = "${sysconfdir}/osmocom/osmo-sgsn.cfg"
+
 FILES_osmo-gbproxy = " \
 		${bindir}/osmo-gbproxy \
 		${sysconfdir}/osmocom/osmo-gbproxy.cfg \
 		"
+CONFFILES_osmo-gbproxy = "${sysconfdir}/osmocom/osmo-gbproxy.cfg"
 
 FILES_osmo-gtphub = " \
 		${bindir}/osmo-gtphub \
 		${sysconfdir}/osmocom/osmo-gtphub.cfg \
 		"
+CONFFILES_osmo-gtphub = "${sysconfdir}/osmocom/osmo-gtphub.cfg"
 
 FILES_osmo-gbproxy-doc = " ${docdir}/osmo-sgsn/examples/osmo-gbproxy "
 FILES_osmo-gtphub-doc = " ${docdir}/osmo-sgsn/examples/osmo-gtphub "