ACPICA: iASL: Enhancement for constant folding.

ACPICA commit 4f9e950d41cd6f6c704d5d6cf518647620d65e99

Add support to fold expressions with a target operand -- these are
folded and converted to a Store operator:

Add (4, 3, INT1) --> Store (7, INT1)

Also supports ASL+ constructs:

INT1 = 4 + 3 --> Store (7, INT1)

Linux kernel is not affected by this patch.

Link: https://github.com/acpica/acpica/commit/4f9e950d
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>

drivers/acpi/acpica/acstruct.h

@@ -68,11 +68,6 @@
 #define ACPI_WALK_METHOD            0x01
 #define ACPI_WALK_METHOD_RESTART    0x02
 
-/* Flags for iASL compiler only */
-
-#define ACPI_WALK_CONST_REQUIRED    0x10
-#define ACPI_WALK_CONST_OPTIONAL    0x20
-
 struct acpi_walk_state {
 	struct acpi_walk_state *next;	/* Next walk_state in list */
 	u8 descriptor_type;	/* To differentiate various internal objs */