!4812 parisc: Clear stale IIR value on instruction access rights trap

Merge Pull Request from: @ci-robot 
 
PR sync from: Cheng Yu <serein.chengyu@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/JIWIVZKVCZM5E76BMCNMQDMRL3NNN2KT/ 
 
https://gitee.com/src-openeuler/kernel/issues/I947PH 
 
Link:https://gitee.com/openeuler/kernel/pulls/4812

 

Reviewed-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>