locking/rt: Remove one __cond_lock() in RT's spin_trylock_irqsave()

locking/rt: Remove one __cond_lock() in RT's spin_trylock_irqsave()

spin_trylock_irqsave() has a __cond_lock() wrapper which points to
__spin_trylock_irqsave(). The function then invokes spin_trylock() which
has another __cond_lock() finally pointing to rt_spin_trylock().

The compiler has no problem to parse this but sparse does not recognise
that users of spin_trylock_irqsave() acquire a conditional lock and
complains.

Remove one layer of __cond_lock() so that sparse recognises conditional
locking.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240812104200.2239232-3-bigeasy@linutronix.de