net: pch_gbe: Use 'dma_free_coherent()' to undo 'dma_alloc_coherent()'

Memory allocation are done with 'dma_alloc_coherent()'. Be consistent
and use 'dma_free_coherent()' to free the corresponding memory.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/20201121090330.1332543-1-christophe.jaillet@wanadoo.frSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c

@@ -1816,7 +1816,8 @@ void pch_gbe_free_tx_resources(struct pch_gbe_adapter *adapter,
 	pch_gbe_clean_tx_ring(adapter, tx_ring);
 	vfree(tx_ring->buffer_info);
 	tx_ring->buffer_info = NULL;
-	pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
+	dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
+			  tx_ring->dma);
 	tx_ring->desc = NULL;
 }
 
@@ -1833,7 +1834,8 @@ void pch_gbe_free_rx_resources(struct pch_gbe_adapter *adapter,
 	pch_gbe_clean_rx_ring(adapter, rx_ring);
 	vfree(rx_ring->buffer_info);
 	rx_ring->buffer_info = NULL;
-	pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
+	dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
+			  rx_ring->dma);
 	rx_ring->desc = NULL;
 }
 
@@ -1954,7 +1956,7 @@ void pch_gbe_down(struct pch_gbe_adapter *adapter)
 	pch_gbe_clean_tx_ring(adapter, adapter->tx_ring);
 	pch_gbe_clean_rx_ring(adapter, adapter->rx_ring);
 
-	pci_free_consistent(adapter->pdev, rx_ring->rx_buff_pool_size,
+	dma_free_coherent(&adapter->pdev->dev, rx_ring->rx_buff_pool_size,
 			  rx_ring->rx_buff_pool, rx_ring->rx_buff_pool_logic);
 	rx_ring->rx_buff_pool_logic = 0;
 	rx_ring->rx_buff_pool_size = 0;