drm/i915: reduce indent in i9xx_hpd_irq_handler

Bail out early if nothing to do. No functional changes.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_irq.c

@@ -1756,7 +1756,9 @@ static void i9xx_hpd_irq_handler(struct drm_device *dev)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
 
-	if (hotplug_status) {
+	if (!hotplug_status)
+		return;
+
 	I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
 	/*
 	 * Make sure hotplug status is cleared before we clear IIR, or else we
@@ -1777,7 +1779,6 @@ static void i9xx_hpd_irq_handler(struct drm_device *dev)
 	if ((IS_G4X(dev) || IS_VALLEYVIEW(dev)) &&
 	    hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X)
 		dp_aux_irq_handler(dev);
-	}
 }
 
 static irqreturn_t valleyview_irq_handler(int irq, void *arg)