!3848 [22.03-LTS-SP3] Bug fix for KVM MMU

Merge Pull Request from: @yuzhang_intel 
 
Title: Bug fix for KVM MMU

Content:
This PR is to fix a bug in KVM MMU. The bug can cause a failure to create a nested VM, when 
- host is an AMD CPU &&
- host is running in 64-bit mode &&
- L1 VMM is running in 32-bit/PAE mode &&
- L1 VMM tries to create L2 using NPT.

Intel-kernel issue:
https://gitee.com/openeuler/intel-kernel/issues/I8UBIZ 
 
Link:https://gitee.com/openeuler/kernel/pulls/3848

 

Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Jason Zeng <jason.zeng@intel.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>