tulip: Convert uses of KERN_DEBUG

Convert logging messages to more current styles.

Added -DDEBUG to Makefile to maintain current message logging.
This could be converted to a specific CONFIG_TULIP_DEBUG option.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tulip/xircom_cb.c b/drivers/net/tulip/xircom_cb.c
index 7e82872..988b8eb 100644
--- a/drivers/net/tulip/xircom_cb.c
+++ b/drivers/net/tulip/xircom_cb.c
@@ -333,7 +333,7 @@
 
 	if (link_status_changed(card)) {
 		int newlink;
-		printk(KERN_DEBUG "xircom_cb: Link status has changed\n");
+		netdev_dbg(dev, "Link status has changed\n");
 		newlink = link_status(card);
 		netdev_info(dev, "Link is %d mbit\n", newlink);
 		if (newlink)