Tegra194: fix warnings for extra parentheses

armclang displays warnings for extra parentheses, leading to
build failures as warnings are treated as errors.
This patch removes the extra parentheses to fix this issue.

Change-Id: Id2fd6a3086590436eecabc55502f40752a018131
Signed-off-by: Kalyani Chidambaram <kalyanic@nvidia.com>

plat/nvidia/tegra/soc/t194/plat_psci_handlers.c

@@ -135,7 +135,7 @@ int32_t tegra_soc_pwr_domain_suspend(const psci_power_state_t *target_state)
 	stateid_afflvl2 = pwr_domain_state[PLAT_MAX_PWR_LVL] &
 		TEGRA194_STATE_ID_MASK;
 
-	if ((stateid_afflvl0 == PSTATE_ID_CORE_POWERDN)) {
+	if (stateid_afflvl0 == PSTATE_ID_CORE_POWERDN) {
 
 		/* Enter CPU powerdown */
 		(void)mce_command_handler((uint64_t)MCE_CMD_ENTER_CSTATE,