[INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h

To help in reducing the number of include dependencies, several files were
touched as they were getting needed headers indirectly for stuff they use.

Thanks also to Alan Menegotto for pointing out that net/dccp/proto.c had
linux/dccp.h include twice.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/raw.h b/include/net/raw.h
index f479174..e67b28a 100644
--- a/include/net/raw.h
+++ b/include/net/raw.h
@@ -19,6 +19,8 @@
 
 #include <linux/config.h>
 
+#include <net/protocol.h>
+
 extern struct proto raw_prot;
 
 extern void 	raw_err(struct sock *, struct sk_buff *, u32 info);