ACPICA: Refactor evaluate_object to reduce nesting

ACPICA commit 599e9159f53565e4a3f3e67f6a03f81fcb10a4cf

Original patch from hanjun.guo@linaro.org

ACPICA BZ 1072.

Link: https://github.com/acpica/acpica/commit/599e9159
Link: https://bugs.acpica.org/show_bug.cgi?id=1072


Original-by: Hanjun Guo <hanjun.guo@linaro.org>
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>