MdeModulePkg/CdExpressPei: Use PcdRecoveryFileName PCD.

This PCD is used to indicated the recovery file name.
The previous name - FvMain.Fv is hardcoded in CdExpressPei.
It does not make sense to force the name.

Now a platform may use any recovery file name.

Cc: Feng Tian <feng.tian@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>

MdeModulePkg/Universal/Disk/CdExpressPei/CdExpressPei.inf

@@ -5,7 +5,7 @@
 # finds whether there is Recovery data in the device. If it finds recovery
 # data, it will install Device Recovery Module PPI.
 #
-# Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
 #
 # This program and the accompanying materials
 # are licensed and made available under the terms and conditions
@@ -68,6 +68,9 @@
 [FeaturePcd]
   gEfiMdeModulePkgTokenSpaceGuid.PcdFrameworkCompatibilitySupport   ## CONSUMES
 
+[Pcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdRecoveryFileName         ## CONSUMES
+
 [Depex]
   gEfiPeiMemoryDiscoveredPpiGuid AND gEfiPeiBootInRecoveryModePpiGuid