bnx2x: use L1_CACHE_BYTES instead of magic number

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bnx2x/bnx2x_cmn.c b/drivers/net/bnx2x/bnx2x_cmn.c
index 7ee9af0..da46309 100644
--- a/drivers/net/bnx2x/bnx2x_cmn.c
+++ b/drivers/net/bnx2x/bnx2x_cmn.c
@@ -358,7 +358,7 @@
 #endif
 
 		prefetch(skb);
-		prefetch(((char *)(skb)) + 128);
+		prefetch(((char *)(skb)) + L1_CACHE_BYTES);
 
 #ifdef BNX2X_STOP_ON_ERROR
 		if (pad + len > bp->rx_buf_size) {
@@ -561,7 +561,7 @@
 					dma_unmap_addr(rx_buf, mapping),
 						   pad + RX_COPY_THRESH,
 						   DMA_FROM_DEVICE);
-			prefetch(((char *)(skb)) + 128);
+			prefetch(((char *)(skb)) + L1_CACHE_BYTES);
 
 			/* is this an error packet? */
 			if (unlikely(cqe_fp_flags & ETH_RX_ERROR_FALGS)) {