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

hipamd/src/hip_device.cpp

@@ -57,7 +57,7 @@ bool Device::Create() {
   }
 
   // Create graph memory pool
-  graph_mem_pool_ = new MemoryPool(this);
+  graph_mem_pool_ = new MemoryPool(this, nullptr, true);
   if (graph_mem_pool_ == nullptr) {
     return false;
   }