rcu: Fix formatting blows in kernel-parameters.txt

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

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

			is the CPU number.  This reduces OS jitter on the

			is the CPU number.  This reduces OS jitter on the

			offloaded CPUs, which can be useful for HPC and

			offloaded CPUs, which can be useful for HPC and

			real-time workloads.  It can also improve energy

			real-time workloads.  It can also improve energy

			efficiency for asymmetric multiprocessors.

			efficiency for asymmetric multiprocessors.

			periodically wake up to do the polling.

			periodically wake up to do the polling.

	rcutree.blimit=	[KNL]

	rcutree.blimit=	[KNL]

			Set maximum number of finished RCU callbacks to process

			Set maximum number of finished RCU callbacks to

			in one batch.

			process in one batch.

	rcutree.rcu_fanout_leaf= [KNL]

	rcutree.rcu_fanout_leaf= [KNL]

			Increase the number of CPUs assigned to each

			Increase the number of CPUs assigned to each

			value is one, and maximum value is HZ.

			value is one, and maximum value is HZ.

	rcutree.qhimark= [KNL]

	rcutree.qhimark= [KNL]

			Set threshold of queued

			Set threshold of queued RCU callbacks beyond which

			RCU callbacks over which batch limiting is disabled.

			batch limiting is disabled.

	rcutree.qlowmark= [KNL]

	rcutree.qlowmark= [KNL]

			Set threshold of queued RCU callbacks below which

			Set threshold of queued RCU callbacks below which