Re-enable HostHdpFlush test

The bus error bug was fixed from kfd driver and Thunk

Change-Id: Id02617fdc26f1c49307f90a0a939e05f22d739e7
Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>

tests/kfdtest/scripts/kfdtest.exclude

@@ -34,8 +34,7 @@ TEMPORARY_BLACKLIST_ALL_ASICS=\
 "KFDQMTest.GPUDoorbellWrite:"\
 "KFDQMTest.mGPUShareBO:"\
 "KFDQMTest.SdmaEventInterrupt:"\
-"KFDDBGTest.BasicDebuggerSuspendResume:"\
-"KFDMemoryTest.HostHdpFlush"
+"KFDDBGTest.BasicDebuggerSuspendResume"
 
 BLACKLIST_ALL_ASICS=\
 "$PERMANENT_BLACKLIST_ALL_ASICS:"\