[TIPC]: Minor cleanup of message header code

This patch eliminates some unused or duplicate message header
symbols, and fixes up the comments and/or location of a few
other symbols.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc net/tipc/link.c
Simple merge

diff --cc net/tipc/msg.c
Simple merge

diff --cc net/tipc/msg.h
Simple merge

diff --cc net/tipc/port.c
Simple merge