drm/i915: Introduce an HAS_IPS() macro

Follow the trend and don't code conditions with platforms but with
features.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index d4e78b6..f72d5a3 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1483,7 +1483,7 @@
 	struct drm_device *dev = node->minor->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	if (!IS_ULT(dev)) {
+	if (!HAS_IPS(dev)) {
 		seq_puts(m, "not supported\n");
 		return 0;
 	}