Revert "rcu: Prevent early boot set_need_resched() from __rcu_pending()"

This reverts commit e239ff05551c7a04ed54c0f5df6f4239b137ede7.
Revert "rcu: Suppress NMI backtraces when stall ends before dump"

This reverts commit 1a5181000b60428ab30f1cc1d44b1600f123e9cd.