SWDEV-354868 - Queue::Create() for RT queue should fail when number of reserved CU's for RT queue is zero (most likely due to being aligned down by dedicatedCuGranularity).

Change-Id: I234e7ff83cb312bf44f5ad4b1a897c079f5106a9

rocclr/device/pal/palvirtual.cpp

@@ -89,6 +89,9 @@ VirtualGPU::Queue* VirtualGPU::Queue::Create(VirtualGPU& gpu, Pal::QueueType que
   } else if (amd::CommandQueue::RealTimeDisabled != rtCU) {
     qCreateInfo.numReservedCu = amd::alignDown(rtCU,
       gpu.dev().properties().engineProperties[Pal::EngineTypeCompute].dedicatedCuGranularity);
+    if (qCreateInfo.numReservedCu == 0) {
+      return nullptr;
+    }
     if ((priority == amd::CommandQueue::Priority::Medium)  &&
          // If Windows HWS is enabled, then the both real time queues are allocated
          // on the same engine