drm/i915: reduce indent in i9xx_hpd_irq_handler
drm/i915: reduce indent in i9xx_hpd_irq_handler

Bail out early if nothing to do. No functional changes.

Signed-off-by: Jani Nikula <ba783f3beccaedfda693f41a15407d612a629408@intel.com>
Signed-off-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@ffwll.ch>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs