arm: zynq: Add support for Bitmain Antminer S9 control board

This is control board on Bitmain Antminer S9.
There are 3 board variables with 256MB, 512MB and 1024MB DDR.
DDR memory is automatically detected with using get_with using
get_ram_size().

Bitmain is using 16MB space for FPGA which is handled via
reserved-memory. Also U-Boot is allocating 16B for storing bootcounts.
Watchdog is started but never service in U-Boot.

SPL MMC is working. SPL NAND is not working because it is not supported
as of now.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/bitmain/antminer_s9/board.c b/board/bitmain/antminer_s9/board.c
new file mode 100644
index 0000000..bb7cef3
--- /dev/null
+++ b/board/bitmain/antminer_s9/board.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../../xilinx/zynq/board.c"