kfdtest: add APUs judgement in LargestVramBufferTest criteria

This patch is to add APUs judgement in LargestVramBufferTest criteria.

Change-Id: Ic69093f8ebed8be0b1c58787e2a294d86fb49bb0


[ROCm/ROCR-Runtime commit: 808a4428b6]

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

@@ -771,7 +771,11 @@ TEST_F(KFDMemoryTest, LargestVramBufferTest) {
             << lastTestedSizeMB << "MB" << std::endl;
 
     /* Make sure 3/5 vram can be allocated.*/
-    EXPECT_GE(lastTestedSizeMB * 5, vramSizeMB * 3);
+    if (vramSizeMB <= 512)
+        EXPECT_GE(lastTestedSizeMB * 5, vramSizeMB * 3);
+    else
+        EXPECT_GE(lastTestedSizeMB * 4, vramSizeMB * 3);
+
     if (lastTestedSizeMB * 16 < vramSizeMB * 15)
         WARN() << "The largest allocated VRAM buffer size is smaller than the expected "
             << vramSizeMB * 15 / 16 << "MB" << std::endl;