locktorture: Add raw_spinlock* torture tests for PREEMPT_RT kernels

In PREEMPT_RT kernels, both spin_lock() and spin_lock_irq() are converted
to sleepable rt_spin_lock().  This means that the interrupt related suffix
for spin_lock/unlock(_irq, irqsave/irqrestore) do not affect the CPU's
interrupt state. This commit therefore adds raw spin-lock torture tests.
This in turn permits pure spin locks to be tested in PREEMPT_RT kernels.

Signed-off-by: Zqiang <qiang1.zhang@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
1 file changed