arm64/mpam: return EOPNOTSUPP when changing rmid of monitor group or resource group with monitor

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I9H4XD



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Change the error return value to be consistent with the error message
semantics.

Fixes: 608e8394 ("arm64/mpam: resctrl: add tips when rmid modification failed")
Signed-off-by: Zeng Heng <zengheng4@huawei.com>