ACPICA: Parser: Move a couple externals to the proper header.

ACPICA commit 7325b59c8b5d1522ded51ae6a76b804f6e8da5d2

Moved from a C module.

Link: https://github.com/acpica/acpica/commit/7325b59c


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