!5317 KVM: s390: fix setting of fpc register

Merge Pull Request from: @ci-robot 
 
PR sync from: Ze Zuo <zuoze1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/HCQYSNRNP26GKEFGZOTQJHP6XGQVAHOB/ 
 
https://gitee.com/src-openeuler/kernel/issues/I96GPO 
 
Link:https://gitee.com/openeuler/kernel/pulls/5317

 

Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>