Revert "sched: power: Remove power capacity hints for kworker threads"

This reverts commit ea855bd62db6bedfa51e171b96cd5f2d1ab41ac8.

Signed-off-by: Mike Turquette <mturquette@linaro.org>

Conflicts:
	kernel/sched/fair.c
cpufreq_schedpower: pass cpu as void * data
it works