fix build by readding something that was deleted in

https://github.com/bart452/kitkat_kernel_lge_msm8974/commit/5472919606ce0090862088797bce9eb41e170a3b
Revert "PM / devfreq: Add a new target flag for the performance governor"

This reverts commit 913ecb860022f767ee9de3333891d1d21619c954.
lazy warning fix