arm64/mpam: fix hard code address map for 1620 2P

hulk inclusion
category: bugfix
bugzilla: 48265
CVE: NA

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The base address is hard code in current version.
P1's base address changed from 0x4000xxxxxxxx to 0x200000xxxxxx.
We need adjust it, or failed to enable mpam.

Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Wang ShaoBo <bobo.shaobowang@huawei.com>
Reviewed-by: Cheng Jian <cj.chengjian@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>