Updated engine_activity api

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

py-interface/README.md

@@ -598,7 +598,7 @@ Input parameters:
 
 * `processor_handle` device which to query
 
-Output: Dictionary with fields
+Output: Dictionary of activites to their respective usage percentage or 'N/A' if not supported
 
 Field | Description
 ---|---