drm/i915: Make i915_save/restore_state and intel_i2c_reset take dev_priv

dev_priv is more appropriate since it is used much more in these.

v2: Commit message and keep the local pdev variable. (Joonas Lahtinen)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index b0e1e7c..5c86925a 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -56,13 +56,12 @@
 	i915_redisable_vga(dev_priv);
 }
 
-int i915_save_state(struct drm_device *dev)
+int i915_save_state(struct drm_i915_private *dev_priv)
 {
-	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct pci_dev *pdev = dev_priv->drm.pdev;
 	int i;
 
-	mutex_lock(&dev->struct_mutex);
+	mutex_lock(&dev_priv->drm.struct_mutex);
 
 	i915_save_display(dev_priv);
 
@@ -97,18 +96,17 @@
 			dev_priv->regfile.saveSWF3[i] = I915_READ(SWF3(i));
 	}
 
-	mutex_unlock(&dev->struct_mutex);
+	mutex_unlock(&dev_priv->drm.struct_mutex);
 
 	return 0;
 }
 
-int i915_restore_state(struct drm_device *dev)
+int i915_restore_state(struct drm_i915_private *dev_priv)
 {
-	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct pci_dev *pdev = dev_priv->drm.pdev;
 	int i;
 
-	mutex_lock(&dev->struct_mutex);
+	mutex_lock(&dev_priv->drm.struct_mutex);
 
 	i915_gem_restore_fences(dev_priv);
 
@@ -145,9 +143,9 @@
 			I915_WRITE(SWF3(i), dev_priv->regfile.saveSWF3[i]);
 	}
 
-	mutex_unlock(&dev->struct_mutex);
+	mutex_unlock(&dev_priv->drm.struct_mutex);
 
-	intel_i2c_reset(dev);
+	intel_i2c_reset(dev_priv);
 
 	return 0;
 }