stat: log out both average and max over the window

stat: log out both average and max over the window

Add option log_window_value alias of log_max_value which reports
average, max or both the values. Retain backward compatibility by
allowing =0 and =1 values to specify avg and max values respectively.

There is no change to existing log formats while reporting only average
or max values.

Signed-off-by: Ankit Kumar <ankit.kumar@samsung.com>
Link: https://lore.kernel.org/r/20240125110124.55137-2-ankit.kumar@samsung.com
Signed-off-by: Vincent Fu <vincent.fu@samsung.com>