Add in function description and comments.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1026 6f19259b-4bc3-4df7-8a09-765794883524

EdkModulePkg/Universal/PCD/Dxe/Pcd.c

@@ -80,10 +80,6 @@ PcdDxeInit (
 
   BuildPcdDxeDataBase ();
 
-  //
-  // BugBug Check if PcdDatabase is already installed.
-  //
-  
   Status = gBS->InstallProtocolInterface (
                   &NewHandle,
                   &gPcdProtocolGuid,

EdkModulePkg/Universal/PCD/Dxe/Pcd.dxs

@@ -11,7 +11,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 Module Name:
 
-  PcdEmulator.dxs
+  Pcd.dxs
 
 Abstract:
 

EdkModulePkg/Universal/PCD/Dxe/Service.c

@@ -1,5 +1,5 @@
 /** @file
-Private functions used by PCD DXE driver.s
+Private functions used by PCD DXE driver.
 
 Copyright (c) 2006, Intel Corporation
 All rights reserved. This program and the accompanying materials
@@ -17,11 +17,6 @@ Module Name: Service.c
 #include "Service.h"
 
 
-//
-// Build Tool will generate DXE_PCD_DB_INIT_VALUE in Autogen.h
-// Compression Algorithm will take care of the size optimization.
-//
-
 PCD_DATABASE * mPcdDatabase;
 
 LIST_ENTRY *mCallbackFnTable;
@@ -341,7 +336,6 @@ BuildPcdDxeDataBase (
   ASSERT (mPcdDatabase != NULL);
 
   GuidHob = GetFirstGuidHob (&gPcdDataBaseHobGuid);
-
   if (GuidHob != NULL) {
 
     //