CHROMIUM: cpufreq: cpu_thermal only allows lower max frequency, fix it

CHROMIUM: cpufreq: cpu_thermal only allows lower max frequency, fix it

The cpu_thermal generic thermal management code has a bug where once
max cpu frequency has been lowered in sysfs (scaling_max_freq) it is
not possible to raise the max back up later.  The bug is that the
notifer gets called by __cpufreq_set_policy() before the user policy
max is raised, and is incorrectly trying to enforce the max frequency
policy even when we are trying to change the policy.

Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
BUG=chromium-os:36435
TEST=kernel_CpufreqMinMax

Change-Id: I12ad4ef5aad544333cad4a9ff1e81f04d1cfa5e8
Reviewed-on: https://gerrit.chromium.org/gerrit/39793
Reviewed-by: Doug Anderson <dianders@chromium.org>
Commit-Ready: Sonny Rao <sonnyrao@chromium.org>
Tested-by: Sonny Rao <sonnyrao@chromium.org>