[SWDEV-SWDEV-568366] fix: Nv4x 95% perf drops

Fix the memory coherency model with Navi 4x due to hipDeviceMallocUncached flag when allocating fine grained memory
Signed-off-by: Oliveira, Daniel <daniel.oliveira@amd.com>

src/header/TransferBench.hpp

@@ -819,7 +819,7 @@ namespace {
 #if defined (__NVCC__)
         return {ERR_FATAL, "Fine-grained GPU memory not supported on NVIDIA platform"};
 #else
-        int flag = hipDeviceMallocUncached;
+        int flag = hipDeviceMallocFinegrained;
         ERR_CHECK(hipExtMallocWithFlags((void**)memPtr, numBytes, flag));
 #endif
       } else if (memType == MEM_MANAGED) {