hlte: power enhancement for wacom hardware.

* always disable digitizer when the pen is inserted

Change-Id: I6c9798682f9f6349b37cb452353bd0c0e6958401
mdnie lite control: add gamma curve switch

switch gamma curve between movie (=0) or dynamic (=1):
[echo 1 > /sys/class/mdnie/mdnie/control_curve]

Thanks to Yank555-lu for the initial code.