cpufreq: interactive: updates from CAF

Add a sampling_down_factor for max frequencies Rohit Gupta Allow
1 ms error in above_hispeed_delay comparisons Rohit Gupta
sync freq feature for interactive governor Rohit Gupta
Reset floor_validate_time if busy at max for 100ms Rohit Gupta
Remove trace event from idle_start handler Rohit Gupta
Modifying sync_freq implementation Rohit Gupta
Use default min_sample_time if SDF is zero Rohit Gupta