FmpDevicePkg/FmpDxe: Use new Variable Lock interface

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3655
The code in FmpDevicePkg call the deprecated interface
VariableLockRequestToLockc. So I changed the code in
FmpDevicePkg using RegisterBasicVariablePolicy, instead
of the deprecated interface.

Signed-off-by: Yang Jie <jie.yang@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Guomin Jiang <guomin.jiang@intel.com>
Cc: Wei6 Xu <wei6.xu@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Reviewed-by: Wei6 Xu <wei6.xu@intel.com>

FmpDevicePkg/FmpDxe/FmpDxe.inf

@@ -4,7 +4,7 @@
 #  information provided through PCDs and libraries.
 #
 #  Copyright (c) 2016, Microsoft Corporation. All rights reserved.<BR>
-#  Copyright (c) 2018 - 2020, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2018 - 2021, Intel Corporation. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
 ##
@@ -55,14 +55,15 @@
   FmpDependencyLib
   FmpDependencyCheckLib
   FmpDependencyDeviceLib
+  VariablePolicyHelperLib
 
 [Guids]
   gEfiEndOfDxeEventGroupGuid
 
 [Protocols]
-  gEdkiiVariableLockProtocolGuid                ## CONSUMES
   gEfiFirmwareManagementProtocolGuid            ## PRODUCES
   gEdkiiFirmwareManagementProgressProtocolGuid  ## PRODUCES
+  gEdkiiVariablePolicyProtocolGuid              ## CONSUMES
 
 [Pcd]
   gFmpDevicePkgTokenSpaceGuid.PcdFmpDeviceStorageAccessEnable              ## CONSUMES