Get rid of battd spam in log

This should fix the following lines in logs;
I/BATTD   (1304): BATTD: Read of Path /sys/class/power_supply/ac/model_name, Failed
I/BATTD   (1304): Could not open '/sys/class/power_supply/ac/model_name'

Patch by YetAnotherForumUser, thanks!

Change-Id: I90cb6fe1bb636f703d7fb4df0c9c53ae2a516246
Signed-off-by: Blechd0se <alex.christ@hotmail.de>
cpufreq: interactive: add unregister_early_suspend

If suspend_enabled is set to 1 and the device screen goes off,
the device can't change the governor anymore.
This is probably due to the suspend/resume code, because with
suspend_enabled set to 0 it won't happen.

So the first idea is to unregister the suspend handler
once the governor exits.

Change-Id: I25b8cfedeb06a58cca25df4c42a151cb106763e5
Signed-off-by: Blechd0se <alex.christ@hotmail.de>
cpufreq: ondemand: delete deprecated sampling_rate_max

Delete sampling_rate_max since its deprecated and
furthermore shows really funny values (tested with AeroControl)

Change-Id: I00286952f07d441b0160c6229bef71c1907ac853
Signed-off-by: Blechd0se <alex.christ@hotmail.de>