net: Convert printks to pr_<level>

Use a more current kernel messaging style.

Convert a printk block to print_hex_dump.
Coalesce formats, align arguments.
Use %s, __func__ instead of embedding function names.

Some messages that were prefixed with <foo>_close are
now prefixed with <foo>_fini.  Some ah4 and esp messages
are now not prefixed with "ip ".

The intent of this patch is to later add something like
  #define pr_fmt(fmt) "IPv4: " fmt.
to standardize the output messages.

Text size is trivially reduced. (x86-32 allyesconfig)

$ size net/ipv4/built-in.o*
   text	   data	    bss	    dec	    hex	filename
 887888	  31558	 249696	1169142	 11d6f6	net/ipv4/built-in.o.new
 887934	  31558	 249800	1169292	 11d78c	net/ipv4/built-in.o.old

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/udplite.c b/net/ipv4/udplite.c
index 12e9499..280bfb1 100644
--- a/net/ipv4/udplite.c
+++ b/net/ipv4/udplite.c
@@ -129,11 +129,11 @@
 	inet_register_protosw(&udplite4_protosw);
 
 	if (udplite4_proc_init())
-		printk(KERN_ERR "%s: Cannot register /proc!\n", __func__);
+		pr_err("%s: Cannot register /proc!\n", __func__);
 	return;
 
 out_unregister_proto:
 	proto_unregister(&udplite_prot);
 out_register_err:
-	printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __func__);
+	pr_crit("%s: Cannot add UDP-Lite protocol\n", __func__);
 }