Tegra186: sanity check target cluster during core power on

This patch sanity checks the target cluster value, during core power on,
by comparing it against the maximum number of clusters supported by the
platform.

Reported by: Rohit Khanna <rokhanna@nvidia.com>

Change-Id: Ia73ccf04bd246403de4ffff6e5c99e3b00fb98ca
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

plat/nvidia/tegra/soc/t186/plat_psci_handlers.c

@@ -295,7 +295,7 @@ int32_t tegra_soc_pwr_domain_on(u_register_t mpidr)
 	uint64_t target_cluster = (mpidr & MPIDR_CLUSTER_MASK) >>
 			MPIDR_AFFINITY_BITS;
 
-	if (target_cluster > MPIDR_AFFLVL1) {
+	if (target_cluster > ((uint32_t)PLATFORM_CLUSTER_COUNT - 1U)) {
 
 		ERROR("%s: unsupported CPU (0x%lx)\n", __func__, mpidr);
 		ret = PSCI_E_NOT_PRESENT;