1) Use FeatureFlag PcdPciBusHotplugDeviceSupport to merge LightPciLib.c with PcdLib.c.

2) Correct some minor bugs: when invoking gRT->GetVariable the Attributes field can be optianal.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2090 6f19259b-4bc3-4df7-8a09-765794883524

EdkModulePkg/Bus/Pci/IdeBus/Dxe/idebus.c

@@ -181,7 +181,6 @@ IDEBusDriverBindingStart (
   UINT16                            CommandBlockBaseAddr;
   UINT16                            ControlBlockBaseAddr;
   UINTN                             DataSize;
-  UINT32                            Attributes;
   IDE_BUS_DRIVER_PRIVATE_DATA       *IdeBusDriverPrivateData;
 
   //
@@ -316,7 +315,7 @@ IDEBusDriverBindingStart (
   Status = gRT->GetVariable (
                   (CHAR16 *) L"Configuration",
                   &gEfiCallerIdGuid,
-                  &Attributes,
+                  NULL,
                   &DataSize,
                   &ConfigurationOptions
                   );