ANDROID: sched/cpufreq_sched: Consolidated update

Contains:

sched/cpufreq_sched: use shorter throttle for raising OPP

Avoid cases where a brief drop in load causes a change to a low OPP
for the full throttle period. Use a shorter throttle period for
raising OPP than for lowering OPP.

sched-freq: Fix handling of max/min frequency

This reverts commit 9726142608f5b3bf5df4280243c9d324e692a510.

Change-Id: Ia78095354f7ad9492f00deb509a2b45112361eda

sched/cpufreq: Increasing throttle_down_nsec to 50ms

Change-Id: I2d8969cf2a64fa719b9dd86f43f9dd14b1ff84fe

sched-freq: make throttle times tunable

Change-Id: I127879645367425b273441d7f0306bb15d5633cb

Signed-off-by: Srinath Sridharan <srinathsr@google.com>
Signed-off-by: Todd Kjos <tkjos@google.com>
Signed-off-by: Juri Lelli <juri.lelli@arm.com>
[jstultz: Fwdported to 4.4]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Andres Oportus <andresoportus@google.com>