[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/gianfar.c b/drivers/net/gianfar.c
index 5a1a116..0db5e6f 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -170,6 +170,7 @@
 	struct resource *r;
 	int idx;
 	int err = 0;
+	DECLARE_MAC_BUF(mac);
 
 	einfo = (struct gianfar_platform_data *) pdev->dev.platform_data;
 
@@ -356,10 +357,8 @@
 	gfar_init_sysfs(dev);
 
 	/* Print out the device info */
-	printk(KERN_INFO DEVICE_NAME, dev->name);
-	for (idx = 0; idx < 6; idx++)
-		printk("%2.2x%c", dev->dev_addr[idx], idx == 5 ? ' ' : ':');
-	printk("\n");
+	printk(KERN_INFO DEVICE_NAME "%s\n",
+	       dev->name, print_mac(mac, dev->dev_addr));
 
 	/* Even more device info helps when determining which kernel */
 	/* provided which set of benchmarks. */