OcAfterBootCompatLib: Extend AllocRelocationBlock support

The current relocation code is only supported in conjunction with
ProvideCustomSlide. Add support for disabled ProvideCustomSlide and
slide=0 in boot-args.

Library/OcAfterBootCompatLib/CustomSlide.c

@@ -813,8 +813,7 @@ AppleSlideGetVariable (
                    FilterMapContext,
                    (BootCompat->CpuInfo->CpuGeneration == OcCpuGenerationSandyBridge)
                                             || (BootCompat->CpuInfo->CpuGeneration == OcCpuGenerationIvyBridge)
-                   )
-              && !BootCompat->ServiceState.AppleCustomSlide)
+                   ))
     {
       //
       // When we cannot allow some KASLR values due to used address we generate

Library/OcAfterBootCompatLib/ServiceOverrides.c

@@ -1079,7 +1079,7 @@ OcGetVariable (
   BootCompat = GetBootCompatContext ();
   IsApple    = BootCompat->ServiceState.AppleBootNestedCount > 0;
 
-  if (IsApple && BootCompat->Settings.ProvideCustomSlide) {
+  if (IsApple && (BootCompat->Settings.ProvideCustomSlide || BootCompat->Settings.AllowRelocationBlock)) {
     Status = AppleSlideGetVariable (
                BootCompat,
                BootCompat->ServicePtrs.GetVariable,