drm/i915: kill struct i915_package_c8

The only remaining field of the struct was the lock, which was
useless.

v2: - Rebase.
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_debugfs.c

@@ -2012,11 +2012,9 @@ static int i915_pc8_status(struct seq_file *m, void *unused)
 		return 0;
 	}
 
-	mutex_lock(&dev_priv->pc8.lock);
 	seq_printf(m, "GPU idle: %s\n", yesno(!dev_priv->mm.busy));
 	seq_printf(m, "IRQs disabled: %s\n",
 		   yesno(dev_priv->pm.irqs_disabled));
-	mutex_unlock(&dev_priv->pc8.lock);
 
 	return 0;
 }

drivers/gpu/drm/i915/i915_drv.h

@@ -1389,10 +1389,6 @@ struct ilk_wm_values {
  *
  * For more, read "Display Sequences for Package C8" on our documentation.
  */
-struct i915_package_c8 {
-	struct mutex lock;
-};
-
 struct i915_runtime_pm {
 	bool suspended;
 	bool irqs_disabled;
@@ -1633,8 +1629,6 @@ typedef struct drm_i915_private {
 		struct ilk_wm_values hw;
 	} wm;
 
-	struct i915_package_c8 pc8;
-
 	struct i915_runtime_pm pm;
 
 	/* Old dri1 support infrastructure, beware the dragons ya fools entering

drivers/gpu/drm/i915/intel_pm.c

@@ -6157,7 +6157,6 @@ void intel_pm_setup(struct drm_device *dev)
 
 	mutex_init(&dev_priv->rps.hw_lock);
 
-	mutex_init(&dev_priv->pc8.lock);
 	INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
 			  intel_gen6_powersave_work);