Revert "gpu: ion: replace __GFP_ZERO with manual zero'ing"

This reverts commit 622d71386e17e393fa99f6a42ca19492aea2802d.
Revert "cpupower: update the cpu_power according to cpu load"

This reverts commit 92d199bf58ab00f15c38909dcd5c261ffd39f524.