drm/zte: 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 zte.
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/20210625082222.3845-28-tzimmermann@suse.de

drivers/gpu/drm/zte/zx_drm_drv.c

@@ -75,12 +75,6 @@ static int zx_drm_bind(struct device *dev)
 		goto out_unbind;
 	}
 
-	/*
-	 * We will manage irq handler on our own.  In this case, irq_enabled
-	 * need to be true for using vblank core support.
-	 */
-	drm->irq_enabled = true;
-
 	drm_mode_config_reset(drm);
 	drm_kms_helper_poll_init(drm);