rcu: Fix formatting blows in kernel-parameters.txt

			for RCU-preempt, and "s" for RCU-sched, and "N"

			is the CPU number.  This reduces OS jitter on the

			offloaded CPUs, which can be useful for HPC and

			real-time workloads.  It can also improve energy

			efficiency for asymmetric multiprocessors.

			periodically wake up to do the polling.

	rcutree.blimit=	[KNL]

			Set maximum number of finished RCU callbacks to process

			in one batch.

			Set maximum number of finished RCU callbacks to

			process in one batch.

	rcutree.rcu_fanout_leaf= [KNL]

			Increase the number of CPUs assigned to each

			value is one, and maximum value is HZ.

	rcutree.qhimark= [KNL]

			Set threshold of queued

			RCU callbacks over which batch limiting is disabled.

			Set threshold of queued RCU callbacks beyond which

			batch limiting is disabled.

	rcutree.qlowmark= [KNL]

			Set threshold of queued RCU callbacks below which