drm/i915: Allow i915_pc8_status debug info on BDW

Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>
Reviewed-by: NBen Widawsky <ben@bwidawsk.net>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_debugfs.c

@@ -2058,7 +2058,7 @@ static int i915_pc8_status(struct seq_file *m, void *unused)
 	struct drm_device *dev = node->minor->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	if (!IS_HASWELL(dev)) {
+	if (!IS_HASWELL(dev) && !IS_BROADWELL(dev)) {
 		seq_puts(m, "not supported\n");
 		return 0;
 	}