scsi: bfa: Remove useless DMA-32 fallback configuration

As stated in [1], dma_set_mask() with a 64-bit mask never fails if
dev->dma_mask is non-NULL. So, if it fails, the 32-bit case will also fail
for the same reason.

Simplify code and remove some dead code accordingly.

[1]: https://lore.kernel.org/linux-kernel/YL3vSPK5DXTNvgdx@infradead.org/#t

Link: https://lore.kernel.org/r/5663cef9b54004fa56cca7ce65f51eadfc3ecddb.1642238127.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: tititiou36

drivers/scsi/bfa/bfad.c

@@ -732,9 +732,6 @@ bfad_pci_init(struct pci_dev *pdev, struct bfad_s *bfad)
 	pci_set_master(pdev);
 
 	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
-	if (rc)
-		rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
-
 	if (rc) {
 		rc = -ENODEV;
 		printk(KERN_ERR "dma_set_mask_and_coherent fail %p\n", pdev);
@@ -1559,9 +1556,6 @@ bfad_pci_slot_reset(struct pci_dev *pdev)
 	pci_set_master(pdev);
 
 	rc = dma_set_mask_and_coherent(&bfad->pcidev->dev, DMA_BIT_MASK(64));
-	if (rc)
-		rc = dma_set_mask_and_coherent(&bfad->pcidev->dev,
-					       DMA_BIT_MASK(32));
 	if (rc)
 		goto out_disable_device;