scsi: isci: use dma_set_mask_and_coherent

The driver currently uses pci_set_dma_mask despite otherwise using the
generic DMA API.  Switch it over to the better generic DMA API.

[mkp: s/iscsi/isci/]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/isci/init.c

@@ -304,21 +304,10 @@ static int isci_pci_init(struct pci_dev *pdev)
 
 	pci_set_master(pdev);
 
-	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
-	if (err) {
-		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 	if (err)
+		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 	return err;
-	}
-
-	err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
-	if (err) {
-		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
-		if (err)
-			return err;
-	}
-
-	return 0;
 }
 
 static int num_controllers(struct pci_dev *pdev)