kfdtest: skip hdp flush test in sriov mode

skip HDP flush test when remap feature is not supported.

Backgroud:
the HDP register remap is skipped in sriov mode,
it will cause mmio base is nullPtr.

Signed-off-by: Yang Wang <KevinYang.Wang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Change-Id: Ib9aea1900931e30571656397a485ee4db051ec0a

tests/kfdtest/src/KFDMemoryTest.cpp

@@ -2084,7 +2084,11 @@ TEST_F(KFDMemoryTest, HostHdpFlush) {
             break;
         }
     }
-    ASSERT_NE(mmioBase, nullPtr) << "mmio base is NULL";
+
+    if (mmioBase == nullPtr) {
+            LOG() << "Skipping test: bsecause mmioBase is nullPtr, the mmio remap feature is not supported." << std::endl;
+            return;
+    }
 
     memoryFlags.ui32.NonPaged = 1;
     memoryFlags.ui32.CoarseGrain = 0;
@@ -2205,7 +2209,11 @@ TEST_F(KFDMemoryTest, DeviceHdpFlush) {
             break;
         }
     }
-    ASSERT_NE(mmioBase, nullPtr) << "mmio base is NULL";
+
+    if (mmioBase == nullPtr) {
+            LOG() << "Skipping test: bsecause mmioBase is nullPtr, the mmio remap feature is not supported." << std::endl;
+            return;
+    }
 
     memoryFlags.ui32.NonPaged = 1;
     memoryFlags.ui32.CoarseGrain = 0;