mac89x0: remove PRINTK()

There are no users of it.
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/mac89x0.c

@@ -73,8 +73,6 @@ static char *version =
    or override something. */
 #include <linux/module.h>
 
-#define PRINTK(x) printk x
-
 /*
   Sources: