drm/i915/display: support struct intel_atomic_state in to_intel_display()

Add support for converting struct intel_atomic_state pointers to struct
intel_display pointers.
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240813164123.2674462-1-jani.nikula@intel.comSigned-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_display_types.h

@@ -2206,6 +2206,8 @@ to_intel_frontbuffer(struct drm_framebuffer *fb)
  */
 #define __drm_device_to_intel_display(p) \
 	(&to_i915(p)->display)
+#define __intel_atomic_state_to_intel_display(p)	\
+	__drm_device_to_intel_display((p)->base.dev)
 #define __intel_connector_to_intel_display(p)		\
 	__drm_device_to_intel_display((p)->base.dev)
 #define __intel_crtc_to_intel_display(p)		\
@@ -2229,6 +2231,7 @@ to_intel_frontbuffer(struct drm_framebuffer *fb)
 #define to_intel_display(p)				\
 	_Generic(*p,					\
 		 __assoc(drm_device, p),		\
+		 __assoc(intel_atomic_state, p),	\
 		 __assoc(intel_connector, p),		\
 		 __assoc(intel_crtc, p),		\
 		 __assoc(intel_crtc_state, p),		\