[NET]: Introduce and use print_mac() and DECLARE_MAC_BUF()

This is nicer than the MAC_FMT stuff.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 7befb70..ad444c9 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -872,6 +872,8 @@
 	int i, err, pci_using_dac;
 	uint16_t eeprom_data = 0;
 	uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
+	DECLARE_MAC_BUF(mac);
+
 	if ((err = pci_enable_device(pdev)))
 		return err;
 
@@ -1132,8 +1134,7 @@
 		 "32-bit"));
 	}
 
-	for (i = 0; i < 6; i++)
-		printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
+	printk("%s\n", print_mac(mac, netdev->dev_addr));
 
 	/* reset the hardware with the new settings */
 	e1000_reset(adapter);