wlan: Enable WLAN_NS_OFFLOAD feature flag in Kbuild

Enable WLAN_NS_OFFLOAD feature flag in Kbuild

Change-Id: I3a9ee4af7fab0b35fbb59610a1b9d7010fbfb6ef
CRs-fixed: 518320
diff --git a/Kbuild b/Kbuild
index 7cf25f3..3dcc5cc 100644
--- a/Kbuild
+++ b/Kbuild
@@ -517,6 +517,7 @@
 		-DWLAN_FEATURE_P2P_DEBUG \
 		-DWLAN_ENABLE_AGEIE_ON_SCAN_RESULTS \
 		-DWLANTL_DEBUG\
+		-DWLAN_NS_OFFLOAD \
 		-DWLAN_ACTIVEMODE_OFFLOAD_FEATURE \
 		-DWLAN_FEATURE_HOLD_RX_WAKELOCK \
 		-DWLAN_SOFTAP_VSTA_FEATURE \