drm/rockchip: 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 rockchip.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210625082222.3845-18-tzimmermann@suse.de

drivers/gpu/drm/rockchip/rockchip_drm_drv.c

@@ -162,12 +162,6 @@ static int rockchip_drm_bind(struct device *dev)
 
 	drm_mode_config_reset(drm_dev);
 
-	/*
-	 * enable drm irq mode.
-	 * - with irq_enabled = true, we can use the vblank feature.
-	 */
-	drm_dev->irq_enabled = true;
-
 	ret = rockchip_drm_fbdev_init(drm_dev);
 	if (ret)
 		goto err_unbind_all;