pegasusq: reduce sample window and adjust hotplug accordingly

Conflicts:

	drivers/cpufreq/cpufreq_pegasusq.c
smdk4412: Notification LED controls

Change-Id: Ic20c4946d4ea2336e1fa844d6600469e3517752d
pegasusq: Add core count load biasing, multiple freq-steps, and fast-down scaling logics.

Original implementations based on Samsung's new sources.

Conflicts:

	drivers/cpufreq/cpufreq_pegasusq.c