Fix README example error

Change-Id: Ib0124642cea34dcbfae0ea3bbe8ffaf09116bede

docs/README.md

@@ -64,22 +64,22 @@ A simple "Hello World" type program that displays the device ID of detected devi
 #include <stdint.h>
 #include "rocm_smi/rocm_smi.h"
 int main() {
-  rsmi_status_t ret; 
-  uint32_t num_devices; 
-  uint64_t dev_id; 
- 
-  // We will skip return code checks for this example, but it 
+  rsmi_status_t ret;
+  uint32_t num_devices;
+  uint16_t dev_id;
+
+  // We will skip return code checks for this example, but it
   // is recommended to always check this as some calls may not
   // apply for some devices or ROCm releases
- 
+
   ret = rsmi_init(0);
   ret = rsmi_num_monitor_devices(&num_devices);
- 
+
   for (int i=0; i < num_devices; ++i) {
     ret = rsmi_dev_id_get(i, &dev_id);
     // dev_id holds the device ID of device i, upon a
-    // successful call  
-  }  
+    // successful call
+  }
   ret = rsmi_shut_down();
   return 0;
 }