arm: zynq: Add board support for cc108

cc108 board is wiring uart via PL which is good platform for SPL fpga
support.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index ecbc964..e82b99c 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -125,6 +125,7 @@
 	uniphier-sld8-ref.dtb
 
 dtb-$(CONFIG_ARCH_ZYNQ) += zynq-zc702.dtb \
+	zynq-cc108.dtb \
 	zynq-zc706.dtb \
 	zynq-zed.dtb \
 	zynq-zybo.dtb \