Revert "sched: Fix select_idle_sibling() bouncing cow syndrome If the previous CPU is cache affine and idle, select it. The current implementation simply traverses the sd_llc domain, taking the first idle CPU encountered, which walks buddy pairs hand in hand over the package, inflicting excruciating pain."

This reverts commit e1497bb3df405b6d0707efb153c278d5be0a32b9.
fix mismerge