Return NOT_SUPPORT for set function in VM guest

Fix the unit tests which are fail in VM guest environment.

Change-Id: Id7c58887692bbdecba54f5d2d8463b292e19b4ad

rocm_smi/include/rocm_smi/rocm_smi_utils.h

@@ -198,6 +198,10 @@ class ScopedAcquire {
   DISALLOW_COPY_AND_ASSIGN(ScopedAcquire);
 };
 
+// The best effort way to decide whether it is in VM guest environment:
+// In VM environment, the /proc/cpuinfo set hypervisor flag by default
+bool is_vm_guest();
+
 }  // namespace smi
 }  // namespace amd