Merge "Assert if power level value greater then PSCI_INVALID_PWR_LVL" into integration

lib/psci/psci_common.c

@@ -193,6 +193,7 @@ static unsigned int get_power_on_target_pwrlvl(void)
 	pwrlvl = psci_get_suspend_pwrlvl();
 	if (pwrlvl == PSCI_INVALID_PWR_LVL)
 		pwrlvl = PLAT_MAX_PWR_LVL;
+	assert(pwrlvl < PSCI_INVALID_PWR_LVL);
 	return pwrlvl;
 }