svm: Add support to set svm mpam configuration

ascend inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I49RB2


CVE: NA

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This add svm_set_mpam interface in svm module, which traverse all
accelerators, and set the mpam configuration in SMMU. If error occurs
during the traverse process, mpam configuration of all accelerators
will rollback to previous.

Signed-off-by: Xingang Wang <wangxingang5@huawei.com>
Reviewed-by: Yingtai Xie <xieyingtai@huawei.com>
Reviewed-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>