net/sis900: Use the DMA_32BIT_MASK constant

diff -urpN linux-2.6.11.orig/drivers/net/sis900.c linux-2.6.11/drivers/net/sis900.c
@@ -66,6 +66,7 @@
 #include <linux/ethtool.h>
 #include <linux/crc32.h>
 #include <linux/bitops.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/processor.h>      /* Processor type for cache alignment. */
 #include <asm/io.h>

@@ -87,8 +88,6 @@ static int sis900_debug;
 
 /* Time in jiffies before concluding the transmitter is hung. */
 #define TX_TIMEOUT  (4*HZ)
-/* SiS 900 is capable of 32 bits BM DMA */
-#define SIS900_DMA_MASK 0xffffffff
 
 enum {
 	SIS_900 = 0,

@@ -400,7 +399,7 @@ static int __devinit sis900_probe(struct
 	ret = pci_enable_device(pci_dev);
 	if(ret) return ret;
 	
-	i = pci_set_dma_mask(pci_dev, SIS900_DMA_MASK);
+	i = pci_set_dma_mask(pci_dev, DMA_32BIT_MASK);
 	if(i){
 		printk(KERN_ERR "sis900.c: architecture does not support"
 			"32bit PCI busmaster DMA\n");