ACPICA: ACPI 4.0: iASL/Disassembler - IPMI keyword support.

Adds support for the new IPMI operation region keyword.
ACPICA BZ 771, 772.

http://acpica.org/bugzilla/show_bug.cgi?id=771
http://acpica.org/bugzilla/show_bug.cgi?id=772

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/acpica/amlcode.h

@@ -404,6 +404,7 @@ typedef enum {
 	REGION_SMBUS,
 	REGION_CMOS,
 	REGION_PCI_BAR,
+	REGION_IPMI,
 	REGION_DATA_TABLE,	/* Internal use only */
 	REGION_FIXED_HW = 0x7F
 } AML_REGION_TYPES;