[BNX2]: Separate tx producer and consumer fields

Put the tx producer and consumer fields in separate cache lines in
the device structure, similar to the VJ net channel queue structure.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 3f2eaf5..6ccacb5 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -48,6 +48,7 @@
 #include <linux/workqueue.h>
 #include <linux/crc32.h>
 #include <linux/prefetch.h>
+#include <linux/cache.h>
 
 #include "bnx2.h"
 #include "bnx2_fw.h"