!217 AMD: Support HSMP feature for AMD EPYC platforms

Merge Pull Request from: @haochengxie 
 
HSMP is short of Host System Management Port. This is a feature of recent AMD EPYC platforms.The Host System Management Port (HSMP) is an interface to provide OS-level software with access to system management functions via a set of mailbox registers. 
 
Link:https://gitee.com/openeuler/kernel/pulls/217

 
Reviewed-by: Chen Wei <chenwei@xfusion.com>
Reviewed-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>