drm/i915: Move HAS_GMCH_DISPLAY definition to platform

Moving all GPU features to the platform definition allows for
        - standard place when adding new features from new platforms
        - possible to see supported features when dumping struct
          definitions

Signed-off-by: Carlos Santa <carlos.santa@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 112e378..fcba6fe 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -665,6 +665,7 @@
 	func(has_hw_contexts) sep \
 	func(has_logical_ring_contexts) sep \
 	func(has_l3_dpf) sep \
+	func(has_gmch_display) sep \
 	func(has_pipe_cxsr) sep \
 	func(has_hotplug) sep \
 	func(cursor_needs_physical) sep \
@@ -2838,8 +2839,7 @@
 #define HAS_PCH_NOP(dev) (INTEL_PCH_TYPE(dev) == PCH_NOP)
 #define HAS_PCH_SPLIT(dev) (INTEL_PCH_TYPE(dev) != PCH_NONE)
 
-#define HAS_GMCH_DISPLAY(dev) (INTEL_INFO(dev)->gen < 5 || \
-			       IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev))
+#define HAS_GMCH_DISPLAY(dev) (INTEL_INFO(dev)->has_gmch_display)
 
 /* DPF == dynamic parity feature */
 #define HAS_L3_DPF(dev) (INTEL_INFO(dev)->has_l3_dpf)