fix(plat/xilinx/zynqmp): use sync method for blocking calls

All API calls except non-blocking should wait for
IPI response and read buffer to check return status
from firmware. Some of API calls are not reading
status from IPI payload data. Use sync method which
reads actual return status from IPI payload.
Signed-off-by: Abhyuday Godhasara <abhyuday.godhasara@xilinx.com>
Change-Id: I78f9c061a80cee6d524ade4ef124ca88ce1848cf

plat/xilinx/zynqmp/pm_service/pm_api_sys.c

@@ -209,7 +209,7 @@ enum pm_ret_status pm_abort_suspend(enum pm_abort_reason reason)
 	/* TODO: allow passing the node ID of the affected CPU */
 	PM_PACK_PAYLOAD3(payload, PM_ABORT_SUSPEND, reason,
 			 primary_proc->node_id);
-	return pm_ipi_send(primary_proc, payload);
+	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
 
 /**
@@ -228,7 +228,7 @@ enum pm_ret_status pm_set_wakeup_source(enum pm_node_id target,
 
 	PM_PACK_PAYLOAD4(payload, PM_SET_WAKEUP_SOURCE, target, wkup_node,
 			 enable);
-	return pm_ipi_send(primary_proc, payload);
+	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
 
 /**
@@ -316,7 +316,7 @@ enum pm_ret_status pm_release_node(enum pm_node_id nid)
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	PM_PACK_PAYLOAD2(payload, PM_RELEASE_NODE, nid);
-	return pm_ipi_send(primary_proc, payload);
+	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
 
 /**
@@ -332,7 +332,7 @@ enum pm_ret_status pm_set_max_latency(enum pm_node_id nid,
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	PM_PACK_PAYLOAD3(payload, PM_SET_MAX_LATENCY, nid, latency);
-	return pm_ipi_send(primary_proc, payload);
+	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
 
 /* Miscellaneous API functions */
@@ -461,7 +461,7 @@ enum pm_ret_status pm_reset_assert(unsigned int reset,
 
 	/* Send request to the PMU */
 	PM_PACK_PAYLOAD3(payload, PM_RESET_ASSERT, reset, assert);
-	return pm_ipi_send(primary_proc, payload);
+	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
 
 /**