Update notes for submitted changes

* kswapd: reduce time spent in congestion_wait
* mm: vmscan: Move pages that fail swapout to LRU active list
* ondemand: add sysfs entry for down_diff_multi_core
* cpufreq: ondemand: Remove unnecessary synchronization attempt
* cpufreq: interactive: Use default min_sample_time if SDF is zero
* cpufreq: interactive: Fix null pointer dereference in interactive governor
* cpufreq: interactive: Modifying sync_freq implementation