libpower: cleanup

*Remove timer/sampling rate management.
*Remove unsupported boostpulse for interactive governor.
*Permissions for boostpulse nodes already set in init.cm.rc.
*Switch default governor back to ondemand and configure it

Change-Id: Id5a26d20fbc4756d73ae642cfa2588199c662bb5
misc cleanups

*remove redundant QCOM_ICS_COMPAT flag
---same flag used for two separate functionalities - both wrong :P

*no need to inherit phone tech makefile anymore
---http://review.cyanogenmod.org/#/c/52265/

*remove unneeded non-CyanogenMod targets from vendorsetup.sh

Change-Id: I4d2625cdac26174ad2591a3c3a16157ab1b64ed3