chore(xilinx): reorder include files as per TF-A guidelines

This commit reorders the include files in accordance with the
guidelines provided by Trusted Firmware-A (TF-A).
The include files are rearranged to ensure a consistent and
organized structure in the codebase, facilitating better
readability and maintainability.

https: //trustedfirmware-a.readthedocs.io/en/latest/process/coding-style.html#headers-and-inclusion
https://git.trustedfirmware.org/ci/tf-a-ci-scripts.git/tree/script/static-checks/

For example, to run header check:
/tf-a-ci-scripts/script/static-checks/check-include-order.py --tree ${PWD} > Includefileorder.txt

Signed-off-by: Prasad Kummari <prasad.kummari@amd.com>
Change-Id: Ia5802722e69859596b94f31ec40755adbf7d865b
diff --git a/plat/xilinx/zynqmp/zynqmp_ehf.c b/plat/xilinx/zynqmp/zynqmp_ehf.c
index 56dc79c..18c3749 100644
--- a/plat/xilinx/zynqmp/zynqmp_ehf.c
+++ b/plat/xilinx/zynqmp/zynqmp_ehf.c
@@ -5,10 +5,10 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#include <platform_def.h>
-
 #include <bl31/ehf.h>
 
+#include <platform_def.h>
+
 /*
  * Enumeration of priority levels on ARM platforms.
  */