net: ipv4: Standardize prefixes for message logging

Add #define pr_fmt(fmt) as appropriate.

Add "IPv4: ", "TCP: ", and "IPsec: " to appropriate files.
Standardize on "UDPLite: " for appropriate uses.
Some prefixes were previously "UDPLITE: " and "UDP-Lite: ".

Add KBUILD_MODNAME ": " to icmp and gre.
Remove embedded prefixes as appropriate.

Add missing "\n" to pr_info in gre.c.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/udplite.h b/include/net/udplite.h
index 5f097ca..7137545 100644
--- a/include/net/udplite.h
+++ b/include/net/udplite.h
@@ -40,7 +40,7 @@
          * checksum. UDP-Lite (like IPv6) mandates checksums, hence packets
          * with a zero checksum field are illegal.                            */
 	if (uh->check == 0) {
-		LIMIT_NETDEBUG(KERN_DEBUG "UDPLITE: zeroed checksum field\n");
+		LIMIT_NETDEBUG(KERN_DEBUG "UDPLite: zeroed checksum field\n");
 		return 1;
 	}
 
@@ -52,7 +52,7 @@
 		/*
 		 * Coverage length violates RFC 3828: log and discard silently.
 		 */
-		LIMIT_NETDEBUG(KERN_DEBUG "UDPLITE: bad csum coverage %d/%d\n",
+		LIMIT_NETDEBUG(KERN_DEBUG "UDPLite: bad csum coverage %d/%d\n",
 			       cscov, skb->len);
 		return 1;