net: wireless: bcmdhd: check privilege on priv cmd

    check net admin capability for ioctl calls
    BUG=26425765

Signed-off-by: Jerry Lee <jerrylee@broadcom.com>

drivers/net/wireless/bcmdhd/wl_android.c

@@ -1287,6 +1287,11 @@ int wl_android_priv_cmd(struct net_device *net, struct ifreq *ifr, int cmd)
 		goto exit;
 	}
 
+	if (!capable(CAP_NET_ADMIN)) {
+		ret = -EPERM;
+		goto exit;
+	}
+
 #ifdef CONFIG_COMPAT
 	if (is_compat_task()) {
 		compat_android_wifi_priv_cmd compat_priv_cmd;