ACPICA: Linuxize: Remove useless platform headers

Some platform headers were added to Linux during previous release
cycles, but they are not useful in Linux, so drop them.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>