fix(versal-net): ignore the unused function return value

This correct MISRA violation C2012-17.7:
The value returned by a function having non-void return type shall
be used.
Typecast the function call to void to discard the return value.

Change-Id: I670b476ba16e791e46aaa00feca991e1a4fff227
Signed-off-by: Maheedhar Bollapalli <maheedharsai.bollapalli@amd.com>
diff --git a/plat/xilinx/versal_net/bl31_versal_net_setup.c b/plat/xilinx/versal_net/bl31_versal_net_setup.c
index 12d3e3b..cf2368a 100644
--- a/plat/xilinx/versal_net/bl31_versal_net_setup.c
+++ b/plat/xilinx/versal_net/bl31_versal_net_setup.c
@@ -214,7 +214,7 @@
 	}
 
 	if (handler != NULL) {
-		handler(intr_id, flags, handle, cookie);
+		(void)handler(intr_id, flags, handle, cookie);
 	}
 
 	return 0;
diff --git a/plat/xilinx/versal_net/plat_psci_pm.c b/plat/xilinx/versal_net/plat_psci_pm.c
index 2182631..a2bf0d9 100644
--- a/plat/xilinx/versal_net/plat_psci_pm.c
+++ b/plat/xilinx/versal_net/plat_psci_pm.c
@@ -42,7 +42,7 @@
 		return PSCI_E_INTERN_FAIL;
 	}
 
-	pm_req_wakeup(proc->node_id, (versal_net_sec_entry & 0xFFFFFFFFU) | 0x1U,
+	(void)pm_req_wakeup(proc->node_id, (versal_net_sec_entry & 0xFFFFFFFFU) | 0x1U,
 		      versal_net_sec_entry >> 32, 0, 0);
 
 	/* Clear power down request */
@@ -166,7 +166,7 @@
 		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_net_sec_entry,
+	(void)pm_self_suspend(proc->node_id, MAX_LATENCY, state, versal_net_sec_entry,
 			SECURE_FLAG);
 
 	/* TODO: disable coherency */
@@ -223,7 +223,7 @@
 static void __dead2 versal_net_system_off(void)
 {
 	/* Send the power down request to the PMC */
-	pm_system_shutdown(XPM_SHUTDOWN_TYPE_SHUTDOWN,
+	(void)pm_system_shutdown(XPM_SHUTDOWN_TYPE_SHUTDOWN,
 			  pm_get_shutdown_scope(), SECURE_FLAG);
 
 	while (true) {