Tuna : Add hardware tunables support

Get rid of device parts, and switch over to the new hardware tunables framework

PS 6: Rebased

Change-Id: I4d1c649416d09646e832dcc23af6caf5b90c492a
tuna: Add missing SE linux from AOSP

 - PS 3: Removed dependencies
 - PS 4: Removed restorecon on sysfs

Change-Id: I68302f7c13134c50093d27f94ce8b5fa88433aab
Merge "Tuna : Add hardware tunables support" into cm-10.2
Merge branch 'cm-10.2' into martincz