net: convert more to %pM

A number of places still use %02x:...:%02x because it's
in debug statements or for no real reason. Make a few
of them use %pM.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c
index 06dd114..fbea856 100644
--- a/drivers/usb/atm/usbatm.c
+++ b/drivers/usb/atm/usbatm.c
@@ -770,10 +770,7 @@
 		return sprintf(page, "%s\n", instance->description);
 
 	if (!left--)
-		return sprintf(page, "MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
-			       atm_dev->esi[0], atm_dev->esi[1],
-			       atm_dev->esi[2], atm_dev->esi[3],
-			       atm_dev->esi[4], atm_dev->esi[5]);
+		return sprintf(page, "MAC: %pM\n", atm_dev->esi);
 
 	if (!left--)
 		return sprintf(page,