change sensor_type in amdsmi_dev_get_temp_metric() to enum

The sensor_type in amdsmi_dev_get_temp_metric() will be changed to
amdsmi_temperature_type_t

Change-Id: I72a7f271b0a55a025acc2ca523062a3d51cc036d

README.md

@@ -133,7 +133,7 @@ int main() {
  
       // Get temperature
       int64_t val_i64 = 0;
-      ret =  amdsmi_dev_get_temp_metric(device_handles[j], 0,
+      ret =  amdsmi_dev_get_temp_metric(device_handles[j], TEMPERATURE_TYPE_EDGE,
               AMDSMI_TEMP_CURRENT, &val_i64);
       std::cout << "\t\tTemperature: " << val_i64/1000 << "C" << std::endl;
     }