acpi: numa: Create enum for memory_target access coordinates indexing

Create enums to provide named indexing for the access coordinate array.
This is in preparation for adding generic port support which will add a
third index in the array to keep the generic port attributes separate from
the memory attributes.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/170319616332.2212653.3872789279950567889.stgit@djiang5-mobl3Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/acpi/numa/hmat.c

@@ -58,12 +58,18 @@ struct target_cache {
 	struct node_cache_attrs cache_attrs;
 };
 
+enum {
+	NODE_ACCESS_CLASS_0 = 0,
+	NODE_ACCESS_CLASS_1,
+	NODE_ACCESS_CLASS_MAX,
+};
+
 struct memory_target {
 	struct list_head node;
 	unsigned int memory_pxm;
 	unsigned int processor_pxm;
 	struct resource memregions;
-	struct access_coordinate coord[2];
+	struct access_coordinate coord[NODE_ACCESS_CLASS_MAX];
 	struct list_head caches;
 	struct node_cache_attrs cache_attrs;
 	bool registered;
@@ -339,10 +345,12 @@ static __init int hmat_parse_locality(union acpi_subtable_headers *header,
 			if (mem_hier == ACPI_HMAT_MEMORY) {
 				target = find_mem_target(targs[targ]);
 				if (target && target->processor_pxm == inits[init]) {
-					hmat_update_target_access(target, type, value, 0);
+					hmat_update_target_access(target, type, value,
+								  NODE_ACCESS_CLASS_0);
 					/* If the node has a CPU, update access 1 */
 					if (node_state(pxm_to_node(inits[init]), N_CPU))
-						hmat_update_target_access(target, type, value, 1);
+						hmat_update_target_access(target, type, value,
+									  NODE_ACCESS_CLASS_1);
 				}
 			}
 		}
@@ -726,8 +734,8 @@ static void hmat_register_target(struct memory_target *target)
 	if (!target->registered) {
 		hmat_register_target_initiators(target);
 		hmat_register_target_cache(target);
-		hmat_register_target_perf(target, 0);
-		hmat_register_target_perf(target, 1);
+		hmat_register_target_perf(target, NODE_ACCESS_CLASS_0);
+		hmat_register_target_perf(target, NODE_ACCESS_CLASS_1);
 		target->registered = true;
 	}
 	mutex_unlock(&target_lock);