rtla/osnoise: Free params at the exit

The variable that stores the parsed command line arguments are not
being free()d at the rtla osnoise top exit path.

Free params variable before exiting.

Link: https://lkml.kernel.org/r/0be31d8259c7c53b98a39769d60cfeecd8421785.1645206561.git.bristot@kernel.org

Fixes: 1eceb2fc ("rtla/osnoise: Add osnoise top mode")
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: NDaniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: NSteven Rostedt (Google) <rostedt@goodmis.org>

tools/tracing/rtla/src/osnoise_top.c

@@ -573,6 +573,7 @@ int osnoise_top_main(int argc, char **argv)
 	osnoise_free_top(tool->data);
 	osnoise_destroy_tool(record);
 	osnoise_destroy_tool(tool);
+	free(params);
 out_exit:
 	exit(return_value);
 }