drm/i915: disable power wells on suspend

We want to make sure everything is disabled and at its lowest power when
freezing.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_drv.c

@@ -557,6 +557,8 @@ static int i915_drm_freeze(struct drm_device *dev)
 
 	dev_priv->suspend_count++;
 
+	intel_display_set_init_power(dev_priv, false);
+
 	return 0;
 }