!9409 drm/mediatek: Add 0 size check to mtk_drm_gem_obj

Merge Pull Request from: @ci-robot 
 
PR sync from: Liu Chuang <liuchuang40@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/DIC7U4UE3VLXVUP6NLPRJ3G5M5KPFLQZ/ 
 
https://gitee.com/src-openeuler/kernel/issues/IA6S8E 
 
Link:https://gitee.com/openeuler/kernel/pulls/9409

 

Reviewed-by: Ye Weihua <yeweihua4@huawei.com>
Reviewed-by: Xu Kuohai <xukuohai@huawei.com>
Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>