ACPICA: Back port of "ACPICA: Dispatcher: Tune interpreter lock around AcpiEvInitializeRegion()"

ACPICA commit bc481e758e54f7644fd0b657119ca7763d8b6a9c

This is a back port result of the following commit:
  Commit: 8633db6b
  Subject: ACPICA: Dispatcher: Fix interpreter locking around acpi_ev_initialize_region()

Link: https://github.com/acpica/acpica/commit/bc481e75


Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>