cross-tree: phase out dma_zalloc_coherent()

We already need to zero out memory for dma_alloc_coherent(), as such
using dma_zalloc_coherent() is superflous. Phase it out.

This change was generated with the following Coccinelle SmPL patch:

@ replace_dma_zalloc_coherent @
expression dev, size, data, handle, flags;
@@

-dma_zalloc_coherent(dev, size, handle, flags)
+dma_alloc_coherent(dev, size, handle, flags)

Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
[hch: re-ran the script on the latest tree]
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/infiniband/hw/bnxt_re/qplib_rcfw.c

@@ -766,8 +766,8 @@ struct bnxt_qplib_rcfw_sbuf *bnxt_qplib_rcfw_alloc_sbuf(
 		return NULL;
 
 	sbuf->size = size;
-	sbuf->sb = dma_zalloc_coherent(&rcfw->pdev->dev, sbuf->size,
-				       &sbuf->dma_addr, GFP_ATOMIC);
+	sbuf->sb = dma_alloc_coherent(&rcfw->pdev->dev, sbuf->size,
+				      &sbuf->dma_addr, GFP_ATOMIC);
 	if (!sbuf->sb)
 		goto bail;
 

drivers/infiniband/hw/bnxt_re/qplib_res.c

@@ -105,10 +105,10 @@ static int __alloc_pbl(struct pci_dev *pdev, struct bnxt_qplib_pbl *pbl,
 
 	if (!sghead) {
 		for (i = 0; i < pages; i++) {
-			pbl->pg_arr[i] = dma_zalloc_coherent(&pdev->dev,
-							     pbl->pg_size,
-							     &pbl->pg_map_arr[i],
-							     GFP_KERNEL);
+			pbl->pg_arr[i] = dma_alloc_coherent(&pdev->dev,
+							    pbl->pg_size,
+							    &pbl->pg_map_arr[i],
+							    GFP_KERNEL);
 			if (!pbl->pg_arr[i])
 				goto fail;
 			pbl->pg_count++;