msm: mdss: Turn off backlight while power off

Turn off the backlight while shut down panel as it
could show white flicker depending on the panel.

Change-Id: Ic5d4e97e70c87e5b6e956e27a766136610d6f345
Signed-off-by: Shuo Yan <shuoy@codeaurora.org>
cpufreq: interactive: Optimize sync_freq implementation

Don't let frequency drop below sync_freq if either load or
frequency among other cpus is above a certain threshold,
not necessarily both.

Change-Id: Iada28e08e812498e16d5189b309a7314f88814dd