arm64/numa: Unify common error path in numa_init()

At present numa_free_distance() is being called before numa_distance is
even initialized with numa_alloc_distance() which is really pointless.
Instead lets call numa_free_distance() on the common error path inside
numa_init() after numa_alloc_distance() has been successful.

Fixes: 1a2db300 ("arm64, numa: Add NUMA support for arm64 platforms")
Acked-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/mm/numa.c

@@ -391,7 +391,6 @@ static int __init numa_init(int (*init_func)(void))
 	nodes_clear(numa_nodes_parsed);
 	nodes_clear(node_possible_map);
 	nodes_clear(node_online_map);
-	numa_free_distance();
 
 	ret = numa_alloc_distance();
 	if (ret < 0)
@@ -399,20 +398,24 @@ static int __init numa_init(int (*init_func)(void))
 
 	ret = init_func();
 	if (ret < 0)
-		return ret;
+		goto out_free_distance;
 
 	if (nodes_empty(numa_nodes_parsed)) {
 		pr_info("No NUMA configuration found\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out_free_distance;
 	}
 
 	ret = numa_register_nodes();
 	if (ret < 0)
-		return ret;
+		goto out_free_distance;
 
 	setup_node_to_cpumask_map();
 
 	return 0;
+out_free_distance:
+	numa_free_distance();
+	return ret;
 }
 
 /**