fix(xilinx): remove unnecessary header include

Platform specific IPI header inclusion is not required
in common IPI source file. So remove inclusion of the same.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Change-Id: I6686757f00370c6ec42b5ee2c44ea5cd13da70c0
diff --git a/plat/xilinx/common/ipi.c b/plat/xilinx/common/ipi.c
index 2f52f38..318079b 100644
--- a/plat/xilinx/common/ipi.c
+++ b/plat/xilinx/common/ipi.c
@@ -1,5 +1,6 @@
 /*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2020-2022, Xilinx, Inc. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -17,7 +18,6 @@
 #include <lib/mmio.h>
 
 #include <ipi.h>
-#include <plat_ipi.h>
 #include <plat_private.h>
 
 /*********************************************************************