[SCTP] Rename SCTP specific control message flags.

Rename SCTP specific control message flags to use SCTP_ prefix rather than
MSG_ prefix as per the latest sctp sockets API draft.

Signed-off-by: Ivan Skytte Jorgensen <isj-sctp@i1.dk>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
diff --git a/include/net/sctp/user.h b/include/net/sctp/user.h
index 1c5f19f..f1c3bc5 100644
--- a/include/net/sctp/user.h
+++ b/include/net/sctp/user.h
@@ -171,10 +171,10 @@
  */
 
 enum sctp_sinfo_flags {
-	MSG_UNORDERED = 1,  /* Send/receive message unordered. */
-	MSG_ADDR_OVER = 2,  /* Override the primary destination. */
-	MSG_ABORT=4,        /* Send an ABORT message to the peer. */
-	/* MSG_EOF is already defined per socket.h */
+	SCTP_UNORDERED = 1,  /* Send/receive message unordered. */
+	SCTP_ADDR_OVER = 2,  /* Override the primary destination. */
+	SCTP_ABORT=4,        /* Send an ABORT message to the peer. */
+	SCTP_EOF=MSG_FIN,    /* Initiate graceful shutdown process. */	
 };