mpam : fix missing fill MSMON_CFG_MON_SEL register

hulk inclusion
category: bugfix
bugzilla: 48265
CVE: NA

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MSMON_CFG_MON_SEL should be set when mpam driver attempt to write/read, fix the
problem by filling MSMON_CFG_MON_SEL with according mon ID.

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