[SCTP]: Beginning of conversion to net-endian for embedded sctp_addr.

Part 1: rename sctp_chunk->source, sctp_sockaddr_entry->a,
sctp_transport->ipaddr and sctp_transport->saddr (to ..._h)

The next patch will reintroduce these fields and keep them as
net-endian mirrors of the original (renamed) ones.  Split in
two patches to make sure that we hadn't forgotten any instanes.

Later in the series we'll eliminate uses of host-endian variants
(basically switching users to net-endian counterparts as we
progress through that mess).  Then host-endian ones will die.

Other embedded host-endian sctp_addr will be easier to switch
directly, so we leave them alone for now.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 2aa61ac..953a73f 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -713,7 +713,7 @@
 	unsigned long sent_at;
 
 	/* What is the origin IP address for this chunk?  */
-	union sctp_addr source;
+	union sctp_addr source_h;
 	/* Destination address for this chunk. */
 	union sctp_addr dest;
 
@@ -756,7 +756,7 @@
 /* This is a structure for holding either an IPv6 or an IPv4 address.  */
 struct sctp_sockaddr_entry {
 	struct list_head list;
-	union sctp_addr a;
+	union sctp_addr a_h;
 	__u8 use_as_src;
 };
 
@@ -842,7 +842,7 @@
 	int	 dead;
 
 	/* This is the peer's IP address and port. */
-	union sctp_addr ipaddr;
+	union sctp_addr ipaddr_h;
 
 	/* These are the functions we call to handle LLP stuff.	 */
 	struct sctp_af *af_specific;
@@ -900,7 +900,7 @@
 	/* Destination */
 	struct dst_entry *dst;
 	/* Source address. */
-	union sctp_addr saddr;
+	union sctp_addr saddr_h;
 
 	/* When was the last time(in jiffies) that a data packet was sent on
 	 * this transport?  This is used to adjust the cwnd when the transport