cpufreq/zzmoove: add cable_min_freq tuneable, bugfixes

- bug fixes

- cable_min_freq
   0 = disabled
   min-max frequency range = set to any available governor frequency.
      the governor will not drop below this frequency while plugged in
cpufreq/zzmoove: add hotplug_stagger_up tuneable

this experimental tuneable only allows one core to be brought online at a time,
as opposed to the normal behavior of bringing as many cores online as requested
all at once.

- hotplug_stagger_up
   0 = disabled
   1 = enabled

- also includes some changes to the default plasma profiles
make button boost adjustable

when gpio or touchkey buttons are pressed, a small and simple cpu boost can be applied.
it is suggested to keep this value very low, 1 or 2 or 3, since it is applied on both
button-down and button-up states.

- ctr_cpuboost_buttons
   0 = disabled
   >0 = how many governor cycles the cpu will be boosted to policy->max