dma-mapping: replace all DMA_28BIT_MASK macro with DMA_BIT_MASK(28)

Replace all DMA_28BIT_MASK macro with DMA_BIT_MASK(28)

Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/net/wan/wanxl.c b/drivers/net/wan/wanxl.c
index 850d70d..8130b79 100644
--- a/drivers/net/wan/wanxl.c
+++ b/drivers/net/wan/wanxl.c
@@ -586,8 +586,8 @@
 	   We set both dma_mask and consistent_dma_mask to 28 bits
 	   and pray pci_alloc_consistent() will use this info. It should
 	   work on most platforms */
-	if (pci_set_consistent_dma_mask(pdev, DMA_28BIT_MASK) ||
-	    pci_set_dma_mask(pdev, DMA_28BIT_MASK)) {
+	if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(28)) ||
+	    pci_set_dma_mask(pdev, DMA_BIT_MASK(28))) {
 		printk(KERN_ERR "wanXL: No usable DMA configuration\n");
 		return -EIO;
 	}