drivers/net/: Use the DMA_{64,32}BIT_MASK constants

Use the DMA_{64,32}BIT_MASK constants from dma-mapping.h when calling
pci_set_dma_mask() or pci_set_consistent_dma_mask()

This patch includes dma-mapping.h explicitly because it caused errors
on some architectures otherwise.

See http://marc.theaimsgroup.com/?t=108001993000001&r=1&w=2 for details

Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch>
Signed-off-by: Domen Puncer <domen@coderock.org>
diff --git a/drivers/net/wan/wanxl.c b/drivers/net/wan/wanxl.c
index 1e7b477..9c1e106 100644
--- a/drivers/net/wan/wanxl.c
+++ b/drivers/net/wan/wanxl.c
@@ -26,6 +26,7 @@
 #include <linux/netdevice.h>
 #include <linux/hdlc.h>
 #include <linux/pci.h>
+#include <linux/dma-mapping.h>
 #include <asm/io.h>
 #include <asm/delay.h>
 
@@ -624,8 +625,8 @@
 	/* FIXME when PCI/DMA subsystems are fixed.
 	   We set both dma_mask and consistent_dma_mask back to 32 bits
 	   to indicate the card can do 32-bit DMA addressing */
-	if (pci_set_consistent_dma_mask(pdev, 0xFFFFFFFF) ||
-	    pci_set_dma_mask(pdev, 0xFFFFFFFF)) {
+	if (pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) ||
+	    pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
 		printk(KERN_ERR "wanXL: No usable DMA configuration\n");
 		wanxl_pci_remove_one(pdev);
 		return -EIO;