arm64/mpam: Store intpri and dspri for mpam device reset

hulk inclusion
category: feature
feature: ARM MPAM support
bugzilla: 48265
CVE: NA

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Register MPAMCFG_PRI's default value is also used for software default
usage after probing resources, two fields hwdef_intpri and hwdef_dspri are
placed into mpam_device structure to store the default priority setting.

Signed-off-by: Wang ShaoBo <bobo.shaobowang@huawei.com>
Reviewed-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: Cheng Jian <cj.chengjian@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>