osmo-sgsn: libosmo-sccp dep is only needed if building with iu support

Change-Id: I97e4e37219f584f0b9d42e21ff9464e2d7143e13
diff --git a/recipes-osmocom/osmo-sgsn/osmo-sgsn.inc b/recipes-osmocom/osmo-sgsn/osmo-sgsn.inc
index 8ed6a10..25c6a25 100644
--- a/recipes-osmocom/osmo-sgsn/osmo-sgsn.inc
+++ b/recipes-osmocom/osmo-sgsn/osmo-sgsn.inc
@@ -3,14 +3,14 @@
 LICENSE = "AGPLv3"
 LIC_FILES_CHKSUM = "file://COPYING;md5=73f1eb20517c55bf9493b7dd6e480788"
 
-DEPENDS = "c-ares libpcap libosmocore libosmo-netif libosmo-sccp osmo-ggsn"
+DEPENDS = "c-ares libpcap libosmocore libosmo-netif osmo-ggsn"
 
 INC_PR="r4.${META_TELEPHONY_OSMO_INC}"
 
 inherit autotools pkgconfig systemd
 
 PACKAGECONFIG ??= "${@bb.utils.filter('DISTRO_FEATURES', 'iu', d)}"
-PACKAGECONFIG[iu] = "--enable-iu,--disable-iu,libasn1c osmo-iuh,"
+PACKAGECONFIG[iu] = "--enable-iu,--disable-iu,libasn1c libosmo-sccp osmo-iuh,"
 
 do_install_append() {
 	install -d ${D}${systemd_system_unitdir}/