Revert "acpuclock-7x30: Added overclocking and undervolting support"

This reverts commit 421d6e919fcfb627f702c3a0f3ef216ff931f12f.

Change-Id: I8f42dc6bda5b7e185051ba48fba06bd30b990d4a
Merge "Revert "acpuclock-7x30: Added overclocking and undervolting support"" into android-4.4