arm64: Add Xilinx ZynqMP support

Add basic Xilinx ZynqMP arm64 support.
Serial and SD is supported.
It supports emulation platfrom ep108 and QEMU.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/xilinx/zynqmp/Makefile b/board/xilinx/zynqmp/Makefile
new file mode 100644
index 0000000..2ab3f19
--- /dev/null
+++ b/board/xilinx/zynqmp/Makefile
@@ -0,0 +1,8 @@
+#
+# (C) Copyright 2014 - 2015 Xilinx, Inc.
+# Michal Simek <michal.simek@xilinx.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= zynqmp.o