x86: lazy-preempt: use proper return label on 32bit-x86

The lazy-preempt uses the wrong return label in case preemption isn't
possible. This results crash while returning to the kernel.

Use the correct return label if preemption isn' possible.

Reported-by: Andri Yngvason <andri@yngvason.is>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>