fix(plat/xilinx/versal): 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: I6f568b85d0da639c264f507122e3015807d8423d

plat/xilinx/versal/pm_service/pm_api_sys.c

@@ -173,7 +173,7 @@ enum pm_ret_status pm_abort_suspend(enum pm_abort_reason reason, uint32_t flag)
 	/* Send request to the PLM */
 	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag, 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);
 }
 
 /**
@@ -909,7 +909,7 @@ enum pm_ret_status pm_set_wakeup_source(uint32_t target, uint32_t wkup_device,
 
 	PM_PACK_PAYLOAD4(payload, LIBPM_MODULE_ID, flag, PM_SET_WAKEUP_SOURCE,
 			 target, wkup_device, enable);
-	return pm_ipi_send(primary_proc, payload);
+	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
 
 /**