sched: set power savings to POWERSAVINGS_BALANCE_WAKEUP
ported to linux 3.0.y from https://github.com/omnirom/android_kernel_samsung_jf/commit/b3bb3e795614779946fe7590c51dfce0f49f38ed
Samsung Update 13
https://github.com/yank555-lu/SGS3-JB/commit/9afc10b67b3c4cefb5c178cf452704bfeeed0d96

took only relevant patches for our platform