!14068  media: v4l2-tpg: prevent the risk of a division by zero

Merge Pull Request from: @ci-robot 
 
PR sync from: Zhao Yipeng <zhaoyipeng5@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/EG6A22T6YHNMRNR7E2RUYOAN7N7XDDL4/ 
 
https://gitee.com/src-openeuler/kernel/issues/IB5ATB 
 
Link:https://gitee.com/openeuler/kernel/pulls/14068 

Reviewed-by: Yuan Can <yuancan@huawei.com> 
Signed-off-by: Yuan Can <yuancan@huawei.com>