Add defines and structs for smb3.1 dialect

Add new structures and defines for SMB3.11 negotiate, session setup and tcon

See MS-SMB2-diff.pdf section 2.2.3 for additional protocol documentation.

Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Steve French <steve.french@primarydata.com>
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 150dbe3..1270806 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -576,7 +576,7 @@
 		return rc;
 
 	req->hdr.SessionId = 0; /* First session, not a reauthenticate */
-	req->VcNumber = 0; /* MBZ */
+	req->Flags = 0; /* MBZ */
 	/* to enable echos and oplocks */
 	req->hdr.CreditRequest = cpu_to_le16(3);