rcu: Add synchronize_sched_expedited() torture tests

This patch adds rcutorture tests for the new
synchronize_sched_expedited() primitive, and also does some
whitespace cleanups in kernel/rcutorture.c as well.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: akpm@linux-foundation.org
Cc: torvalds@linux-foundation.org
Cc: davem@davemloft.net
Cc: dada1@cosmosbay.com
Cc: zbr@ioremap.net
Cc: jeff.chua.linux@gmail.com
Cc: paulus@samba.org
Cc: laijs@cn.fujitsu.com
Cc: jengelh@medozas.de
Cc: r000n@r000n.net
Cc: benh@kernel.crashing.org
Cc: mathieu.desnoyers@polymtl.ca
LKML-Reference: <12459460981342-git-send-email->
Signed-off-by: Ingo Molnar <mingo@elte.hu>