Revert "net: usb: asix: fill null-ptr-deref in asix_suspend"

This reverts commit baedf68.

There is an updated version of this fix which covers
the problem more thoroughly.

Signed-off-by: David S. Miller <davem@davemloft.net>

Author: davem330

drivers/net/usb/asix_devices.c

@@ -626,7 +626,7 @@ static int asix_suspend(struct usb_interface *intf, pm_message_t message)
 	struct usbnet *dev = usb_get_intfdata(intf);
 	struct asix_common_private *priv = dev->driver_priv;
 
-	if (priv && priv->suspend)
+	if (priv->suspend)
 		priv->suspend(dev);
 
 	return usbnet_suspend(intf, message);