ACPICA: Cleanup for internal Reference Object

Fix some sloppiness in the Reference object. No longer use AML
opcodes to differentiate the types, introduce new reference
Class. Cleanup the debug output code.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c
index f3cc376..a085cc3 100644
--- a/drivers/acpi/namespace/nsxfeval.c
+++ b/drivers/acpi/namespace/nsxfeval.c
@@ -45,7 +45,6 @@
 #include <acpi/acpi.h>
 #include <acpi/acnamesp.h>
 #include <acpi/acinterp.h>
-#include <acpi/amlcode.h>
 
 #define _COMPONENT          ACPI_NAMESPACE
 ACPI_MODULE_NAME("nsxfeval")
@@ -399,13 +398,13 @@
 	 * (AML_LOAD_OP) cannot be dereferenced, nor can it be converted to
 	 * an union acpi_object.
 	 */
-	switch (info->return_object->reference.opcode) {
-	case AML_INDEX_OP:
+	switch (info->return_object->reference.class) {
+	case ACPI_REFCLASS_INDEX:
 
 		obj_desc = *(info->return_object->reference.where);
 		break;
 
-	case AML_REF_OF_OP:
+	case ACPI_REFCLASS_REFOF:
 
 		node = info->return_object->reference.object;
 		if (node) {