drm/i915/irq: use DISPLAY_VER instead of GRAPHICS_VER

Display code should not care about graphics version.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240104174350.823605-1-jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_display_irq.c

@@ -1587,7 +1587,7 @@ void ilk_de_irq_postinstall(struct drm_i915_private *i915)
 	struct intel_uncore *uncore = &i915->uncore;
 	u32 display_mask, extra_mask;
 
-	if (GRAPHICS_VER(i915) >= 7) {
+	if (DISPLAY_VER(i915) >= 7) {
 		display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
 				DE_PCH_EVENT_IVB | DE_AUX_CHANNEL_A_IVB);
 		extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB |