arm64/mpam: update last_cmd_status in parse_cache() and parse_bw()

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I61CPK


CVE: NA

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Update last_cmd_status to tell the reasons of returning 'Invalid argument'
in parse_cache() and parse_bw().

Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: Wang ShaoBo <bobo.shaobowang@huawei.com>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>