MdeModulePkg DxeCore: Don't cache memory mapped IO FV.

Previous DxeCore FwVol code will cache whole FvMain FV from flash that may be
uncached if platform reports FvMain FVB, it will impact DXE performance.

The code already has file level cache, so don’t need to cache memory mapped IO FV.
It can also reduce memory consumption of caching memory mapped IO FVs.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15916 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Core/Dxe/DxeMain.h

@@ -2,7 +2,7 @@
   The internal header file includes the common header files, defines
   internal structure and functions used by DxeCore module.
 
-Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2014, 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
@@ -2356,6 +2356,8 @@ GetSection (
   SEP member function.  Deletes an existing section stream
 
   @param  StreamHandleToClose    Indicates the stream to close
+  @param  FreeStreamBuffer       TRUE - Need to free stream buffer;
+                                 FALSE - No need to free stream buffer.
 
   @retval EFI_SUCCESS            The section stream is closed sucessfully.
   @retval EFI_OUT_OF_RESOURCES   Memory allocation failed.
@@ -2366,7 +2368,8 @@ GetSection (
 EFI_STATUS
 EFIAPI
 CloseSectionStream (
-  IN  UINTN                                     StreamHandleToClose
+  IN  UINTN                                     StreamHandleToClose,
+  IN  BOOLEAN                                   FreeStreamBuffer
   );
 
 /**