arm: zynq: Add support for SYZYGY Hub board

Add the Zynq-based SYZYGY Hub board from Opal Kelly. The board
contains a Xilinx Zynq xc7z012s SoC, 1GB DDR3 RAM, and supports
booting from SD.

Signed-off-by: Tom McLeod <tom.mcleod@opalkelly.com>
Cc: Michal Simek <monstr@monstr.eu>
CC: Albert Aribaud <albert.u.boot@aribaud.net>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index cd540e9..ecbc964 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -137,7 +137,8 @@
 	zynq-zc770-xm010.dtb \
 	zynq-zc770-xm011.dtb \
 	zynq-zc770-xm012.dtb \
-	zynq-zc770-xm013.dtb
+	zynq-zc770-xm013.dtb \
+	zynq-syzygy-hub.dtb
 dtb-$(CONFIG_ARCH_ZYNQMP) += \
 	zynqmp-ep108.dtb			\
 	zynqmp-zcu102-revA.dtb			\