drm/kirin: 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 kirin.
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/20210625082222.3845-11-tzimmermann@suse.de

drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c

@@ -185,8 +185,6 @@ static int kirin_drm_kms_init(struct drm_device *dev,
 		DRM_ERROR("failed to initialize vblank.\n");
 		goto err_unbind_all;
 	}
-	/* with irq_enabled = true, we can use the vblank feature. */
-	dev->irq_enabled = true;
 
 	/* reset all the states of crtc/plane/encoder/connector */
 	drm_mode_config_reset(dev);