fix(plat/xilinx/versal): resolve misra R17.7

MISRA Violation: MISRA-C:2012 R.17.7
- The value returned by a function having non-void return type shall be
  used ((void) missing for discarded return value.).

Signed-off-by: Abhyuday Godhasara <abhyuday.godhasara@xilinx.com>
Change-Id: I1e6a598b9fe6c571a3e5010ee832ef860dfe491d

plat/xilinx/versal/plat_psci.c

@@ -33,8 +33,8 @@ static int versal_pwr_domain_on(u_register_t mpidr)
 	proc = pm_get_proc((unsigned int)cpu_id);
 
 	/* Send request to PMC to wake up selected ACPU core */
-	pm_req_wakeup(proc->node_id, (versal_sec_entry & 0xFFFFFFFFU) | 0x1U,
-		      versal_sec_entry >> 32, 0, SECURE_FLAG);
+	(void)pm_req_wakeup(proc->node_id, (versal_sec_entry & 0xFFFFFFFFU) | 0x1U,
+			    versal_sec_entry >> 32, 0, SECURE_FLAG);
 
 	/* Clear power down request */
 	pm_client_wakeup(proc);
@@ -69,8 +69,8 @@ static void versal_pwr_domain_suspend(const psci_power_state_t *target_state)
 		PM_STATE_SUSPEND_TO_RAM : PM_STATE_CPU_IDLE;
 
 	/* Send request to PMC to suspend this core */
-	pm_self_suspend(proc->node_id, MAX_LATENCY, state, versal_sec_entry,
-			SECURE_FLAG);
+	(void)pm_self_suspend(proc->node_id, MAX_LATENCY, state, versal_sec_entry,
+			      SECURE_FLAG);
 
 	/* APU is to be turned off */
 	if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) {
@@ -126,8 +126,8 @@ void versal_pwr_domain_on_finish(const psci_power_state_t *target_state)
 static void __dead2 versal_system_off(void)
 {
 	/* Send the power down request to the PMC */
-	pm_system_shutdown(XPM_SHUTDOWN_TYPE_SHUTDOWN,
-			  pm_get_shutdown_scope(), SECURE_FLAG);
+	(void)pm_system_shutdown(XPM_SHUTDOWN_TYPE_SHUTDOWN,
+				 pm_get_shutdown_scope(), SECURE_FLAG);
 
 	while (1) {
 		wfi();
@@ -141,8 +141,8 @@ static void __dead2 versal_system_off(void)
 static void __dead2 versal_system_reset(void)
 {
 	/* Send the system reset request to the PMC */
-	pm_system_shutdown(XPM_SHUTDOWN_TYPE_RESET,
-			  pm_get_shutdown_scope(), SECURE_FLAG);
+	(void)pm_system_shutdown(XPM_SHUTDOWN_TYPE_RESET,
+				 pm_get_shutdown_scope(), SECURE_FLAG);
 
 	while (1) {
 		wfi();
@@ -175,8 +175,8 @@ static void versal_pwr_domain_off(const psci_power_state_t *target_state)
 	 * invoking CPU_on function, during which resume address will
 	 * be set.
 	 */
-	pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_IDLE, 0,
-			SECURE_FLAG);
+	(void)pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_IDLE, 0,
+			      SECURE_FLAG);
 }
 
 /**

plat/xilinx/versal/sip_svc_setup.c

@@ -42,7 +42,7 @@ DEFINE_SVC_UUID2(versal_sip_uuid,
 static int32_t sip_svc_setup(void)
 {
 	/* PM implementation as SiP Service */
-	pm_setup();
+	(void)pm_setup();
 
 	return 0;
 }