ACPICA: Add ACPI_MOVE_NAME macro to optimize 4-byte ACPI_NAME copies

Resolves to a 32-bit move for the normal case, strncpy on machines
that do not support misaligned transfers.

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>