Fix multithreaded FVP power domain tree

The number of levels in the topology has not changed but the count of
processing elements on the lowest layer is now multiplied by the value
of FVP_MAX_PE_PER_CPU.
Signed-off-by: Imre Kis <imre.kis@arm.com>
Change-Id: Ia1568a40ea33dbbbcdfab6c8ab6d19f4db0b8eb4

plat/arm/board/fvp/fvp_topology.c

 /*
- * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -36,7 +36,8 @@ const unsigned char *plat_get_power_domain_tree_desc(void)
 	fvp_power_domain_tree_desc[1] = FVP_CLUSTER_COUNT;
 
 	for (i = 0; i < FVP_CLUSTER_COUNT; i++)
-		fvp_power_domain_tree_desc[i + 2] = FVP_MAX_CPUS_PER_CLUSTER;
+		fvp_power_domain_tree_desc[i + 2] =
+			FVP_MAX_CPUS_PER_CLUSTER * FVP_MAX_PE_PER_CPU;
 
 
 	return fvp_power_domain_tree_desc;