!4630 Add support for Hygon model 6h L3 PMU

Merge Pull Request from: @hygoner 
 
Add L3 PMU support for Hygon family 18h model 6h processor.

Only Hygon will use family 18h, so minimize the modification and share most
existed codes, see reference [2].

Reference:
[1] https://gitee.com/openeuler/kernel/pulls/1638
[2] https://lkml.iu.edu/hypermail/linux/kernel/1809.2/00921.html 
 
Link:https://gitee.com/openeuler/kernel/pulls/4630

 

Reviewed-by: Xu Kuohai <xukuohai@huawei.com>
Reviewed-by: Jason Zeng <jason.zeng@intel.com>
Reviewed-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>