rtla/osnoise: Prevent NULL dereference in error handling

If the "tool->data" allocation fails then there is no need to call
osnoise_free_top() and, in fact, doing so will lead to a NULL dereference.

Cc: [e-mail]
Cc: John Kacur <[e-mail]>
Cc: "Luis Claudio R. Goncalves" <[e-mail]>
Cc: Clark Williams <[e-mail]>
Fixes: 1eceb2fc2ca5 ("rtla/osnoise: Add osnoise top mode")
Link: https://lore.kernel.org/[e-mail]
Signed-off-by: Dan Carpenter <[e-mail]>
Signed-off-by: Steven Rostedt (Google) <[e-mail]>

tools/tracing/rtla/src/osnoise_top.c

···
 		return NULL;
 
 	tool->data = osnoise_alloc_top(nr_cpus);
-	if (!tool->data)
-		goto out_err;
+	if (!tool->data) {
+		osnoise_destroy_tool(tool);
+		return NULL;
+	}
 
 	tool->params = params;
 
···
 				   osnoise_top_handler, NULL);
 
 	return tool;
-
-out_err:
-	osnoise_free_top(tool->data);
-	osnoise_destroy_tool(tool);
-	return NULL;
 }
 
 static int stop_tracing;