MdeModulePkg/NvmExpressDxe: Refine PassThru IO queue creation behavior

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1260

For the PassThru() service of NVM Express Pass Through Protocol, the
current implementation (function NvmExpressPassThru()) will only use the
IO Completion/Submission queues created internally by this driver during
the controller initialization process. Any other IO queues created will
not be consumed.

So the value is little to accept external IO Completion/Submission queue
creation request. This commit will refine the behavior of function
NvmExpressPassThru(), it will only accept driver internal IO queue
creation commands and will return "EFI_UNSUPPORTED" for external ones.

Cc: Jiewen Yao <Jiewen.yao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpress.h

@@ -3,7 +3,7 @@
   NVM Express specification.
 
   (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
-  Copyright (c) 2013 - 2017, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
@@ -147,6 +147,11 @@ struct _NVME_CONTROLLER_PRIVATE_DATA {
   NVME_CQHDBL                         CqHdbl[NVME_MAX_QUEUES];
   UINT16                              AsyncSqHead;
 
+  //
+  // Flag to indicate internal IO queue creation.
+  //
+  BOOLEAN                             CreateIoQueue;
+
   UINT8                               Pt[NVME_MAX_QUEUES];
   UINT16                              Cid[NVME_MAX_QUEUES];