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>

drivers/gpu/drm/i915/i915_debugfs.c

@@ -1483,7 +1483,7 @@ static int i915_ips_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_ULT(dev)) {
+	if (!HAS_IPS(dev)) {
 		seq_puts(m, "not supported\n");
 		return 0;
 	}

drivers/gpu/drm/i915/i915_drv.h

@@ -1474,6 +1474,8 @@ struct drm_i915_file_private {
 #define HAS_PIPE_CXSR(dev) (INTEL_INFO(dev)->has_pipe_cxsr)
 #define I915_HAS_FBC(dev) (INTEL_INFO(dev)->has_fbc)
 
+#define HAS_IPS(dev)		(IS_ULT(dev))
+
 #define HAS_PIPE_CONTROL(dev) (INTEL_INFO(dev)->gen >= 5)
 
 #define HAS_DDI(dev)		(INTEL_INFO(dev)->has_ddi)

drivers/gpu/drm/i915/intel_display.c

@@ -3250,7 +3250,7 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
 /* IPS only exists on ULT machines and is tied to pipe A. */
 static bool hsw_crtc_supports_ips(struct intel_crtc *crtc)
 {
-	return IS_ULT(crtc->base.dev) && crtc->pipe == PIPE_A;
+	return HAS_IPS(crtc->base.dev) && crtc->pipe == PIPE_A;
 }
 
 static void hsw_enable_ips(struct intel_crtc *crtc)
@@ -4069,7 +4069,7 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc,
 		pipe_config->pipe_bpp = 8*3;
 	}
 
-	if (IS_HASWELL(dev))
+	if (HAS_IPS(dev))
 		hsw_compute_ips_config(crtc, pipe_config);
 
 	/* XXX: PCH clock sharing is done in ->mode_set, so make sure the old