kfdtest: fix infinite loop in sdma multicopy

when variable interval become zero, the loop of while (timeConsumption >= interval)
will be a infinite loop. The fix is to avoid that case.

Change-Id: I8fd07296925300bace5ab7d3da86482b6d8b0d03
Signed-off-by: Eric Huang <JinhuiEric.Huang@amd.com>


[ROCm/ROCR-Runtime commit: 634b30119a]

projects/rocr-runtime/tests/kfdtest/src/KFDTestUtilQueue.cpp

@@ -422,6 +422,9 @@ void sdma_multicopy_report(std::vector<SDMACopyParams> &array, HSAuint64 countPe
         begin = array[base].timeBegin;
         end = array[base + countPerGroup - 1].timeEnd;
 
+        if (begin == 0 && end == 0)
+            continue;
+
         if (timeConsumptionMax < end - begin)
             timeConsumptionMax = end - begin;