Revert "sched: Fix endless sync_sched/rcu() loop inside _cpu_down()"

This reverts commit 5577948b97792c2212d6f9d716427eeb927bd443.
voltages.
Revert "sched: Remove extra put_online_cpus() inside sched_setaffinity()"

This reverts commit 68b4f3f3c88d0703882e3ff86527646402217366.
Revert "sched: Remove get_online_cpus() usage"

This reverts commit f5cf304405edb8e19cf421ceb8e0e420676b3155.
Revert "Further the Unalignment process"

This reverts commit 4bd4814c34b7e318f5d0268b260c02bb6591304f.
Revert "Enable Unaligned access"

This reverts commit 556df2a16bc49367886d522362d02952cd0777f8.