arm64: zynqmp: Switch to amd.com emails

Update my and DPs email address to match current setup.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/aba5b19b9c5a95608829e86ad5cc4671c940f1bb.1688992543.git.michal.simek@amd.com
diff --git a/board/xilinx/zynqmp/Makefile b/board/xilinx/zynqmp/Makefile
index 732f909..204e4fa 100644
--- a/board/xilinx/zynqmp/Makefile
+++ b/board/xilinx/zynqmp/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0+
 #
 # (C) Copyright 2014 - 2016 Xilinx, Inc.
-# Michal Simek <michal.simek@xilinx.com>
+# Michal Simek <michal.simek@amd.com>
 
 obj-y	:= zynqmp.o