ACPICA: Restore code that repairs NULL package elements in return values.

The original code was lost accidently, it was not generated along with the
following commit of mechanism improvements and thus not get merged:

  Commit: d5a36100


  Subject: ACPICA: Add mechanism for early object repairs on a per-name basis

  Adds the framework to allow object repairs very early in the
  return object analysis. Enables repairs like string->unicode,
  etc.

This patch restores the implementation of the NULL element repair code for
ACPI_RTYPE_NONE.  In the original design, ACPI_RTYPE_NONE is defined to
collect simple NULL object repairs.
Lv Zheng.

Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=67901
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Cc: 3.10+ <stable@vger.kernel.org> # 3.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>