m68k/sun3: Use %pM format specifier to print ethernet address

printk() supports %pM format specifier for printing 6-byte MAC/FDDI
addresses in hex notation small buffers, let's use it intead of %x:%x...
Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/sun3/idprom.c

@@ -125,8 +125,5 @@ void __init idprom_init(void)
 
 	display_system_type(idprom->id_machtype);
 
-	printk("Ethernet address: %x:%x:%x:%x:%x:%x\n",
-		    idprom->id_ethaddr[0], idprom->id_ethaddr[1],
-		    idprom->id_ethaddr[2], idprom->id_ethaddr[3],
-		    idprom->id_ethaddr[4], idprom->id_ethaddr[5]);
+	printk("Ethernet address: %pM\n", idprom->id_ethaddr);
 }