crypto: use pci_zalloc_consistent

Remove the now unnecessary memset too.
Signed-off-by: NJoe Perches <joe@perches.com>
Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/crypto/hifn_795x.c

@@ -2617,14 +2617,13 @@ static int hifn_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		}
 	}
 
-	dev->desc_virt = pci_alloc_consistent(pdev, sizeof(struct hifn_dma),
-			&dev->desc_dma);
+	dev->desc_virt = pci_zalloc_consistent(pdev, sizeof(struct hifn_dma),
+					       &dev->desc_dma);
 	if (!dev->desc_virt) {
 		dprintk("Failed to allocate descriptor rings.\n");
 		err = -ENOMEM;
 		goto err_out_unmap_bars;
 	}
-	memset(dev->desc_virt, 0, sizeof(struct hifn_dma));
 
 	dev->pdev = pdev;
 	dev->irq = pdev->irq;