Fix the checkpatch warning as below:
  WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/delay.h>
                        udelay(100);
                        goto retry;
                }
-               printk(KERN_WARNING "SUN4V: tod_get() timed out.\n");
+               pr_warn("tod_get() timed out.\n");
                return 0;
        }
-       printk(KERN_WARNING "SUN4V: tod_get() not supported.\n");
+       pr_warn("tod_get() not supported.\n");
        return 0;
 }
 
                        udelay(100);
                        goto retry;
                }
-               printk(KERN_WARNING "SUN4V: tod_set() timed out.\n");
+               pr_warn("tod_set() timed out.\n");
                return -EAGAIN;
        }
-       printk(KERN_WARNING "SUN4V: tod_set() not supported.\n");
+       pr_warn("tod_set() not supported.\n");
        return -EOPNOTSUPP;
 }