Revert "sched: change cpu_avg_load_per_task using h_nr_running"

This reverts commit c1e029b7eacb9d14288cb3f9443aa1a2c5e36fb5.
Revert "sched: change pick_next_task_fair to h_nr_running"

This reverts commit d3270ecb151828b7d4276fcaf7e28873ce1766b4.
Revert "sched: change update_sg_lb_stats to h_nr_running"

This reverts commit 62e283667ccb7aba8815739eab0873deb1ffbd06.
Revert "sched: change find_busiest_queue to h_nr_running"

This reverts commit 8b090f78b49aacbed022432f7de83cc197813c4b.
Revert "sched: change active_load_balance_cpu_stop to use h_nr_running"

This reverts commit 603324ea6e9b77bc320501f33800f85688ed9af1.