amd-xgbe: Add ethtool show/set ring parameter support

Add ethtool support to show and set the number of the Rx and Tx ring
descriptors.  Changing the ring configuration will result in a device
restart.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
index 7c204f0..2646c08 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
@@ -1426,10 +1426,8 @@ static void xgbe_stopdev(struct work_struct *work)
 	netdev_alert(pdata->netdev, "device stopped\n");
 }
 
-static void xgbe_restart_dev(struct xgbe_prv_data *pdata)
+void xgbe_restart_dev(struct xgbe_prv_data *pdata)
 {
-	DBGPR("-->xgbe_restart_dev\n");
-
 	/* If not running, "restart" will happen on open */
 	if (!netif_running(pdata->netdev))
 		return;
@@ -1440,8 +1438,6 @@ static void xgbe_restart_dev(struct xgbe_prv_data *pdata)
 	xgbe_free_rx_data(pdata);
 
 	xgbe_start(pdata);
-
-	DBGPR("<--xgbe_restart_dev\n");
 }
 
 static void xgbe_restart(struct work_struct *work)