drm/i915: Convert dev_priv->dev backpointers to dev_priv->drm

Since drm_i915_private is now a subclass of drm_device we do not need to
chase the drm_i915_private->dev backpointer and can instead simply
access drm_i915_private->drm directly.

   text	   data	    bss	    dec	    hex	filename
1068757	   4565	    416	1073738	 10624a	drivers/gpu/drm/i915/i915.ko
1066949	   4565	    416	1071930	 105b3a	drivers/gpu/drm/i915/i915.ko

Created by the coccinelle script:
@@
struct drm_i915_private *d;
identifier i;
@@
(
- d->dev->i
+ d->drm.i
|
- d->dev
+ &d->drm
)

and for good measure the dev_priv->dev backpointer was removed entirely.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1467711623-2905-4-git-send-email-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 1083f5e..5e4d894 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -540,7 +540,7 @@
 
 void intel_power_sequencer_reset(struct drm_i915_private *dev_priv)
 {
-	struct drm_device *dev = dev_priv->dev;
+	struct drm_device *dev = &dev_priv->drm;
 	struct intel_encoder *encoder;
 
 	if (WARN_ON(!IS_VALLEYVIEW(dev) && !IS_CHERRYVIEW(dev) &&
@@ -2286,7 +2286,7 @@
 	 * 2. Program DP PLL enable
 	 */
 	if (IS_GEN5(dev_priv))
-		intel_wait_for_vblank_if_active(dev_priv->dev, !crtc->pipe);
+		intel_wait_for_vblank_if_active(&dev_priv->drm, !crtc->pipe);
 
 	intel_dp->DP |= DP_PLL_ENABLE;
 
@@ -3387,7 +3387,7 @@
 		I915_WRITE(intel_dp->output_reg, DP);
 		POSTING_READ(intel_dp->output_reg);
 
-		intel_wait_for_vblank_if_active(dev_priv->dev, PIPE_A);
+		intel_wait_for_vblank_if_active(&dev_priv->drm, PIPE_A);
 		intel_set_cpu_fifo_underrun_reporting(dev_priv, PIPE_A, true);
 		intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true);
 	}
@@ -5147,9 +5147,9 @@
 	}
 
 	if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
-		intel_dp_set_drrs_state(dev_priv->dev,
-			intel_dp->attached_connector->panel.
-			fixed_mode->vrefresh);
+		intel_dp_set_drrs_state(&dev_priv->drm,
+					intel_dp->attached_connector->panel.
+					fixed_mode->vrefresh);
 
 	dev_priv->drrs.dp = NULL;
 	mutex_unlock(&dev_priv->drrs.mutex);
@@ -5179,9 +5179,9 @@
 		goto unlock;
 
 	if (dev_priv->drrs.refresh_rate_type != DRRS_LOW_RR)
-		intel_dp_set_drrs_state(dev_priv->dev,
-			intel_dp->attached_connector->panel.
-			downclock_mode->vrefresh);
+		intel_dp_set_drrs_state(&dev_priv->drm,
+					intel_dp->attached_connector->panel.
+					downclock_mode->vrefresh);
 
 unlock:
 	mutex_unlock(&dev_priv->drrs.mutex);
@@ -5223,9 +5223,9 @@
 
 	/* invalidate means busy screen hence upclock */
 	if (frontbuffer_bits && dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
-		intel_dp_set_drrs_state(dev_priv->dev,
-				dev_priv->drrs.dp->attached_connector->panel.
-				fixed_mode->vrefresh);
+		intel_dp_set_drrs_state(&dev_priv->drm,
+					dev_priv->drrs.dp->attached_connector->panel.
+					fixed_mode->vrefresh);
 
 	mutex_unlock(&dev_priv->drrs.mutex);
 }
@@ -5268,9 +5268,9 @@
 
 	/* flush means busy screen hence upclock */
 	if (frontbuffer_bits && dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
-		intel_dp_set_drrs_state(dev_priv->dev,
-				dev_priv->drrs.dp->attached_connector->panel.
-				fixed_mode->vrefresh);
+		intel_dp_set_drrs_state(&dev_priv->drm,
+					dev_priv->drrs.dp->attached_connector->panel.
+					fixed_mode->vrefresh);
 
 	/*
 	 * flush also means no more activity hence schedule downclock, if all