arm64/mpam: Fix use-after-free in mkdir_resctrl_prepare()

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4K272


CVE: NA

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We add label out_free_rdtgrp for handling error branch when it happened
before rmid and closid allocation, in case of reusing rdtgrp after freeing.

Fixes: 0b16164d ("arm64/mpam: Remap reqpartid,pmg to rmid and intpartid to closid")
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>