net: drop unused attribute argument from sysfs queue funcs

The show and store functions don't need/use the attribute.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 4302f31..52ae78c 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2376,7 +2376,7 @@ static int init_vqs(struct virtnet_info *vi)
 
 #ifdef CONFIG_SYSFS
 static ssize_t mergeable_rx_buffer_size_show(struct netdev_rx_queue *queue,
-		struct rx_queue_attribute *attribute, char *buf)
+		char *buf)
 {
 	struct virtnet_info *vi = netdev_priv(queue->dev);
 	unsigned int queue_index = get_netdev_rx_queue_index(queue);