[INET_DIAG]: Rename tcp_diag.[ch] to inet_diag.[ch]

Next changeset will introduce net/ipv4/tcp_diag.c, moving the code that was put
transitioanlly in inet_diag.c.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dccp/diag.c b/net/dccp/diag.c
index 9f07eff..0b10c17 100644
--- a/net/dccp/diag.c
+++ b/net/dccp/diag.c
@@ -12,7 +12,7 @@
 #include <linux/config.h>
 
 #include <linux/module.h>
-#include <linux/tcp_diag.h>
+#include <linux/inet_diag.h>
 
 #include "dccp.h"