arm64/mpam: support resctrl fs to show mounting option

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I91UCV


CVE: NA

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Support to display MPAM mounting options:

  # mount -t resctrl resctrl /sys/fs/resctrl/ -o cdpl3,mbMin,mbMax,mbHdl,caPbm
  # mount | grep resctrl
  resctrl on /sys/fs/resctrl type resctrl (rw,relatime,cdpl3,caPbm,mbMax,mbMin,mbHdl)

Signed-off-by: Zeng Heng <zengheng4@huawei.com>