zero: power: use new GPU frequency control interface
zero: power: use new GPU frequency control interface

Change-Id: I512fe75ccb51218a9d0299e2257cd11b628b6742

TeamNexus/android_device_samsung_zero-common,TeamNexus/android_device_samsung_zero-common,TeamNexus/android_device_samsung_zero-common,TeamNexus/android_device_samsung_zero-common,TeamNexus/android_device_samsung_zero-common