drm/stm: Don't set struct drm_device.irq_enabled

The field drm_device.irq_enabled is only used by legacy drivers
with userspace modesetting. Don't set it in stm.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Tested-by: Yannick Fertre <yannick.fertre@foss.st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210625082222.3845-20-tzimmermann@suse.de

drivers/gpu/drm/stm/ltdc.c

@@ -1338,9 +1338,6 @@ int ltdc_load(struct drm_device *ddev)
 		goto err;
 	}
 
-	/* Allow usage of vblank without having to call drm_irq_install */
-	ddev->irq_enabled = 1;
-
 	clk_disable_unprepare(ldev->pixel_clk);
 
 	pinctrl_pm_select_sleep_state(ddev->dev);