dma-mapping: replace all DMA_40BIT_MASK macro with DMA_BIT_MASK(40)

Replace all DMA_40BIT_MASK macro with DMA_BIT_MASK(40)

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/bnx2.c b/drivers/net/bnx2.c
index aa75a4b..5fd5770 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -7525,7 +7525,7 @@
 
 	/* 5708 cannot support DMA addresses > 40-bit.  */
 	if (CHIP_NUM(bp) == CHIP_NUM_5708)
-		persist_dma_mask = dma_mask = DMA_40BIT_MASK;
+		persist_dma_mask = dma_mask = DMA_BIT_MASK(40);
 	else
 		persist_dma_mask = dma_mask = DMA_BIT_MASK(64);