kernel: sched: Revert some changes

Revert "sched: window-based load stats improvements"

This reverts commit f902b90282478ac53cfc80ae8f1ce13b7ffeff43.

Revert "sched: Add min_max_freq and rq->max_possible_freq"

This reverts commit 105bcead669378cc21d702c5d8f66b14f7588cd7.

Revert "sched: move task load based functions"

This reverts commit 6e680c9bf999a5e5c65b60dfc8084438008ef510.

Change-Id: I3333d2de5455b6638ca807b627bf4a64236a8563
bacon: Increase debug level

Change-Id: Ie93f8ebea3de80b07748c1e05240cdc223bb589b