drm/i915: Use dev_priv in public intel_fifo_underrun.c functions

It's the new rule!

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 321701d..ede9606 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -756,13 +756,13 @@
 }
 
 /* intel_fifo_underrun.c */
-bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
+bool intel_set_cpu_fifo_underrun_reporting(struct drm_i915_private *dev_priv,
 					   enum pipe pipe, bool enable);
-bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev,
+bool intel_set_pch_fifo_underrun_reporting(struct drm_i915_private *dev_priv,
 					   enum transcoder pch_transcoder,
 					   bool enable);
-void i9xx_check_fifo_underruns(struct drm_device *dev);
-bool __cpu_fifo_underrun_reporting_enabled(struct drm_device *dev,
+void i9xx_check_fifo_underruns(struct drm_i915_private *dev_priv);
+bool __cpu_fifo_underrun_reporting_enabled(struct drm_i915_private *dev_priv,
 					   enum pipe pipe);
 
 /* i915_irq.c */