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/ipmr.c b/net/ipv4/ipmr.c
index 7bc2db6..0518a4f 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -951,7 +951,7 @@
 	rcu_read_unlock();
 	if (ret < 0) {
 		if (net_ratelimit())
-			printk(KERN_WARNING "mroute: pending queue full, dropping entries.\n");
+			pr_warn("mroute: pending queue full, dropping entries\n");
 		kfree_skb(skb);
 	}
 
@@ -2538,7 +2538,7 @@
 		goto reg_notif_fail;
 #ifdef CONFIG_IP_PIMSM_V2
 	if (inet_add_protocol(&pim_protocol, IPPROTO_PIM) < 0) {
-		printk(KERN_ERR "ip_mr_init: can't add PIM protocol\n");
+		pr_err("%s: can't add PIM protocol\n", __func__);
 		err = -EAGAIN;
 		goto add_proto_fail;
 	}