remove wpa_supplicant flags

ERROR: "wl_iw_handler_def" [drivers/net/wireless/bcmdhd/dhd.ko] undefined!
ERROR: "wl_iw_event" [drivers/net/wireless/bcmdhd/dhd.ko] undefined!
ERROR: "wl_iw_detach" [drivers/net/wireless/bcmdhd/dhd.ko] undefined!
ERROR: "wl_iw_get_wireless_stats" [drivers/net/wireless/bcmdhd/dhd.ko] undefined!
ERROR: "wl_iw_ioctl" [drivers/net/wireless/bcmdhd/dhd.ko] undefined!