FP4: Enable asynchronous library events in WPA supplicant

Change-Id: I3b028afa54605bd57d9fb5700d792cb9e5e0e76f
diff --git a/BoardConfig.mk b/BoardConfig.mk
index a4885ff..d2ddc07 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -209,6 +209,7 @@
 BOARD_HOSTAPD_PRIVATE_LIB := lib_driver_cmd_$(BOARD_WLAN_DEVICE)
 BOARD_WPA_SUPPLICANT_DRIVER := NL80211
 BOARD_WPA_SUPPLICANT_PRIVATE_LIB := lib_driver_cmd_$(BOARD_WLAN_DEVICE)
+BOARD_WPA_SUPPLICANT_PRIVATE_LIB_EVENT := "ON"
 WIFI_DRIVER_DEFAULT := qca_cld3
 WIFI_DRIVER_STATE_CTRL_PARAM := "/dev/wlan"
 WIFI_DRIVER_STATE_OFF := "OFF"