!362 AMD: Support svm guest when host CR4.LA57 is set.

Merge Pull Request from: @haochengxie 
 
Add svm guest support when host CR4.LA57 is set. This issue can be fixed by backporting upstream patch.
Reference link:https://lore.kernel.org/lkml/20210818165549.3771014-1-wei.huang2@amd.com/ 
 
Link:https://gitee.com/openeuler/kernel/pulls/362

 

Reviewed-by: Kevin Zhu <zhukeqian1@huawei.com>
Reviewed-by: Jason Zeng <jason.zeng@intel.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Acked-by: Zheng Zengkai <zhengzengkai@huawei.com>