Updated engine_activity api

Signed-off-by: Maisam Arif <maisarif@amd.com>
Change-Id: I3f62e093fdc0254015c0837dca59763551d3659c

py-interface/amdsmi_interface.py

@@ -1697,12 +1697,18 @@ def amdsmi_get_gpu_activity(
         )
     )
 
-    return {
+    activity_dict = {
         "gfx_activity": engine_usage.gfx_activity,
         "umc_activity": engine_usage.umc_activity,
         "mm_activity": engine_usage.mm_activity,
     }
 
+    for key, value in activity_dict.items():
+        if value == 0xFFFF:
+            activity_dict[key] = "N/A"
+
+    return activity_dict
+
 
 def amdsmi_get_clock_info(
     processor_handle: amdsmi_wrapper.amdsmi_processor_handle,