drm/i915: Use simpler form of spin_lock_irq(execlist_lock)

We can use the simpler spinlock form to disable interrupts as we are
always outside of an irq/softirq handler.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
1 file changed