[TCP]: Move the tcp sock states to net/tcp_states.h

Lots of places just needs the states, not even linux/tcp.h, where this
enum was, needs it.

This speeds up development of the refactorings as less sources are
rebuilt when things get moved from net/tcp.h.

Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/tcp.h b/include/net/tcp.h
index bc110cc..9d026d8 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -36,6 +36,8 @@
 #include <net/sock.h>
 #include <net/snmp.h>
 #include <net/ip.h>
+#include <net/tcp_states.h>
+
 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 #include <linux/ipv6.h>
 #endif