xilinx: Add support to send PM API to PMC using IPI for versal

Port ZynqMP PM services for versal to send PM APIs to PMC
using IPI.

Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Wendy Liang <wendy.liang@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: I27a52faf27f1a2919213498276a6885a177cb6da
diff --git a/plat/xilinx/versal/pm_service/pm_client.h b/plat/xilinx/versal/pm_service/pm_client.h
new file mode 100644
index 0000000..6840bb1
--- /dev/null
+++ b/plat/xilinx/versal/pm_service/pm_client.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2019, Xilinx, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * Contains APU specific macros and macros to be defined depending on
+ * the execution environment.
+ */
+
+#ifndef PM_CLIENT_H
+#define PM_CLIENT_H
+
+#include "pm_common.h"
+#include "pm_defs.h"
+
+/* Global variables to be set in pm_client.c */
+extern const struct pm_proc *primary_proc;
+
+#endif /* PM_CLIENT_H */