ACPICA: Update version to 20170831

ACPICA commit faa9fdfbd035a14347e6a875be2a0cddb3e6fc00

Version 20170831.

Link: https://github.com/acpica/acpica/commit/faa9fdfbd035
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>

include/acpi/acpixf.h

@@ -46,7 +46,7 @@
 
 /* Current ACPICA subsystem version in YYYYMMDD format */
 
-#define ACPI_CA_VERSION                 0x20170728
+#define ACPI_CA_VERSION                 0x20170831
 
 #include <acpi/acconfig.h>
 #include <acpi/actypes.h>