SWDEV-353281 - Change pool type for graphs

Under ROCr physical allocations don't have initial VA and require extra
flag in ROCclr. Add an option to have a mempool of physical allocations.

Change-Id: I4d062fe0dd8113d4eaf6e8b51749ed56d8701d1e

rocclr/device/rocm/rocvirtual.cpp

@@ -2615,6 +2615,9 @@ void VirtualGPU::submitVirtualMap(amd::VirtualMapCommand& vcmd) {
       LogError("HSA Command: hsa_amd_vmem_map failed!");
     }
   } else {
+    dispatchBarrierPacket(kBarrierPacketHeader, false);
+    Barriers().WaitCurrent();
+
     // Unmap the object, since the physical addr is set.
     if ((hsa_status = hsa_amd_vmem_unmap(vaddr_mem_obj->getSvmPtr(), vcmd.size()))
                         == HSA_STATUS_SUCCESS) {