otter: Commonize KSM property (2/2)

depend on http://review.cyanogenmod.org/#/c/64972/

Change-Id: Idaed1ad19e6929eaab82406b48b7d6ed5abf037a
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_amazon_otter into cd-4.4