Support events in the amdsmi

Port the events handling from rocm-smi to amd-smi

Change-Id: I0b4cb30a585cb2188a24be0e21c1c156b461bb1d

amd_smi/include/impl/amd_smi_system.h

@@ -72,6 +72,9 @@ class AMDSmiSystem {
     amdsmi_status_t handle_to_device(amdsmi_device_handle device_handle,
             AMDSmiDevice** device);
 
+    amdsmi_status_t gpu_index_to_handle(uint32_t gpu_index,
+                    amdsmi_device_handle* device_handle);
+
  private:
     AMDSmiSystem() : init_flag_(AMD_SMI_INIT_ALL_DEVICES) {}
     uint64_t init_flag_;