kfdtest: Add event-based synchronization mechanism to queues

Wait4PacketConsumption now can accept an event to wait all packets subbmitted
to be processed.

Change-Id: I1497b7704e892b04d05811b8d3e4742237c1be57
Signed-off-by: xinhui pan <xinhui.pan@amd.com>

tests/kfdtest/src/PM4Queue.cpp

@@ -71,3 +71,15 @@ void PM4Queue::SubmitPacket() {
     }
 }
 
+void PM4Queue::Wait4PacketConsumption(HsaEvent *event) {
+    if (event) {
+        PlaceAndSubmitPacket(PM4ReleaseMemoryPacket(0,
+                    event->EventData.HWData2,
+                    event->EventId,
+                    true));
+
+        EXPECT_SUCCESS(hsaKmtWaitOnEvent(event, g_TestTimeOut));
+    } else {
+        BaseQueue::Wait4PacketConsumption();
+    }
+}