Set correct DMA mask for ax24xx hardware

drivers/dahdi/opvxa24xx/base.c

@@ -2359,6 +2359,16 @@ static int __devinit a24xx_init_one(struct pci_dev *pdev, const struct pci_devic
 				
 		wc->index = index;
 
+		// Set the DMA mask appropriately
+		if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)) || dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32))) {
+			if (wc_dev->freeregion) {
+				release_mem_region(wc_dev->mem_region, wc_dev->mem_len);
+				iounmap((void *)wc_dev->mem32);
+				dev_warn(&wc_dev->dev->dev, "No suitable DMA available.\n");
+				return -EIO;
+			}
+		}
+
 			
 		/* Allocate enough memory for two dahdi chunks, receive and transmit.  Each sample uses
 		   8 bits.  */