drm/i915: Move HAS_GMBUS_IRQ definition to platform definition

Moving all GPU features to the platform struct 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 10ff512..66548d6 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -661,6 +661,7 @@
 	func(has_rc6) sep \
 	func(has_rc6p) sep \
 	func(has_dp_mst) sep \
+	func(has_gmbus_irq) sep \
 	func(has_pipe_cxsr) sep \
 	func(has_hotplug) sep \
 	func(cursor_needs_physical) sep \
@@ -2770,7 +2771,7 @@
  * interrupt source and so prevents the other device from working properly.
  */
 #define HAS_AUX_IRQ(dev) (INTEL_INFO(dev)->gen >= 5)
-#define HAS_GMBUS_IRQ(dev) (INTEL_INFO(dev)->gen >= 5)
+#define HAS_GMBUS_IRQ(dev) (INTEL_INFO(dev)->has_gmbus_irq)
 
 /* With the 945 and later, Y tiling got adjusted so that it was 32 128-byte
  * rows, which changed the alignment requirements and fence programming.