feat(xilinx): clean macro names

This is preparation for cleaning up IPI local and remote side
communication. As of today macros are aligned to communication
channel but there is missing calculation based on channel
selection.

Change-Id: Iac7daf832ff372ea2fece72a15afdfe988b4b7db
Signed-off-by: Michal Simek <michal.simek@amd.com>
diff --git a/plat/xilinx/versal_net/pm_service/pm_client.c b/plat/xilinx/versal_net/pm_service/pm_client.c
index 2741d47..9aeb4eb 100644
--- a/plat/xilinx/versal_net/pm_service/pm_client.c
+++ b/plat/xilinx/versal_net/pm_service/pm_client.c
@@ -62,7 +62,7 @@
 static const struct pm_ipi apu_ipi = {
 	.local_ipi_id = IPI_ID_APU,
 	.remote_ipi_id = IPI_ID_PMC,
-	.buffer_base = IPI_BUFFER_APU_BASE,
+	.buffer_base = IPI_BUFFER_LOCAL_BASE,
 };
 
 /* Order in pm_procs_all array must match cpu ids */