cpufreq: ondemand: updates from CAF

ondemand: add sysfs entry for down_diff_multi_core	Krishna Vanka
cpufreq: ondemand: fix timer-related list corruption in store_powersave_bias()	Osvaldo Banuelos
cpufreq: ondemand: add input_boost interface	Dilip Gudlur
cpufreq: ondemand: Fix hotplug deadlock with store_powersave_bias	Matt Wagantall
cpufreq: ondemand: Fix update_sampling_rate race with hotplug	Rohit Gupta
cpufreq: ondemand: Boost CPU frequency only for touch input	Tingwei Zhang
cpufreq: ondemand: Disable freq sync feature in store_powersave_bias	Rohit Gupta
cpufreq: ondemand: Fix locking issue in store_powersave_bias	Rohit Gupta
cpufreq: ondemand: change freq sync code to use per-CPU kthreads	Steve Muckle
cpufreq: ondemand: Fix locking in store_powersave_bias	Matt Wagantall
cpufreq: ondemand: Fix store_powersave_bias() race with hotplug	Matt Wagantall
cpufreq: Use dedicated high-priority workqueues	Matt Wagantall