arm64: mm: Introduce procfs interface to update PBHA0 bit

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I7ZC0H



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Introduce /proc/<pid>/pbha_bit0 to update PBHA bit0.

Value 0/1 can be accepted by this procfs:
- 0: iter all vmas of this task, clear VM_PBHA_BIT0 for all vmas.
  New vma will stop bring VM_PBHA_BIT0 if exists. clear PTE 59 bit for
  all pte entries.
- 1: iter all vmas of this task, set VM_PBHA_BIT0 for all vmas.
  New vma will bring VM_PBHA_BIT0 by default. set PTE 59 bit for
  all pte entries.

Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>