!5830 fbdev: sis: Error out if pixclock equals zero

Merge Pull Request from: @ci-robot 
 
PR sync from: Jinjiang Tu <tujinjiang@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/2DD5GW7H72TXU7WVXIGRN4UC6ZJQBB3B/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9E2MG 
 
Link:https://gitee.com/openeuler/kernel/pulls/5830

 

Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>