drm/i915: Move intel_init_clock_gating() to i915_gem_init()

	intel_init_gt_powersave(dev_priv);

	ret = i915_gem_init_hw(dev_priv);

	if (ret)

		goto out_unlock;

	/*

	 * Despite its name intel_init_clock_gating applies both display

	 * clock gating workarounds; GT mmio workarounds and the occasional

	 * GT power context workaround. Worse, sometimes it includes a context

	 * register workaround which we need to apply before we record the

	 * default HW state for all contexts.

	 *

	 * FIXME: break up the workarounds and apply them at the right time!

	 */

	intel_init_clock_gating(dev_priv);

out_unlock:

	if (ret == -EIO) {

		/* Allow engine initialisation to fail by marking the GPU as

		 * wedged. But we only want to do this where the GPU is angry,

		}

		ret = 0;

	}

out_unlock:

	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);

	mutex_unlock(&dev_priv->drm.struct_mutex);

{

	struct drm_i915_private *dev_priv = to_i915(dev);

	intel_init_clock_gating(dev_priv);

	intel_setup_overlay(dev_priv);

}