!2305 drm/inspur: fix compile warning

Merge Pull Request from: @ci-robot 
 
PR sync from: Hongchen Zhang <zhanghongchen@loongson.cn>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/75752CU4Z4QAWCIPOYDFTVWU6ZQDC4RV/ 
 
https://gitee.com/openeuler/kernel/issues/I84IWW 
 
Link:https://gitee.com/openeuler/kernel/pulls/2305

 

Reviewed-by: Li Xuefeng <lixuefeng@loongson.cn>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>