Revert previous check in. ECP is only supposed to support UEFI 2.0.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6450 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Foundation/Library/Dxe/EfiDriverLib/Event.c

@@ -190,6 +190,8 @@ Returns:
   return EFI_SUCCESS;
 }
 
+#if (EFI_SPECIFICATION_VERSION >= 0x00020000)
+
 static
 VOID
 EFIAPI
@@ -209,7 +211,7 @@ EventNotifySignalAllNullEvent (
   return;
 }
 
-
+#endif
 
 EFI_STATUS
 EFIAPI
@@ -243,7 +245,7 @@ Returns:
   UINT32            EventType;
   EFI_EVENT_NOTIFY  WorkerNotifyFunction;
 
-  if (gST->Hdr.Revision < 0x00020000) {
+#if (EFI_SPECIFICATION_VERSION < 0x00020000)
 
   if (NotifyFunction == NULL) {
     EventType = EFI_EVENT_SIGNAL_LEGACY_BOOT | EFI_EVENT_NOTIFY_SIGNAL_ALL;
@@ -262,7 +264,7 @@ Returns:
                   NotifyContext,
                   LegacyBootEvent
                   );
-  } else {
+#else
 
   EventType = EFI_EVENT_NOTIFY_SIGNAL;
   if (NotifyFunction == NULL) {
@@ -285,8 +287,7 @@ Returns:
                   &gEfiEventLegacyBootGuid,
                   LegacyBootEvent
                   );
-  }
-
+#endif
   return Status;
 }
 
@@ -323,7 +324,7 @@ Return:
   UINT32            EventType;
   EFI_EVENT_NOTIFY  WorkerNotifyFunction;
 
-  if (gST->Hdr.Revision < 0x00020000) {
+#if (EFI_SPECIFICATION_VERSION < 0x00020000)
 
   if (NotifyFunction == NULL) {
     EventType = EFI_EVENT_SIGNAL_READY_TO_BOOT | EFI_EVENT_NOTIFY_SIGNAL_ALL;
@@ -342,7 +343,7 @@ Return:
                   NotifyContext,
                   ReadyToBootEvent
                   );
-  } else {
+#else
 
   EventType = EFI_EVENT_NOTIFY_SIGNAL;
   if (NotifyFunction == NULL) {
@@ -365,6 +366,6 @@ Return:
                   &gEfiEventReadyToBootGuid,
                   ReadyToBootEvent
                   );
-  }
+#endif
   return Status;
 }