ARM: dts: uniphier: add PH1-LD20 SoC/board device tree sources

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 578038b..f2ea60f 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -57,6 +57,7 @@
 	armada-xp-theadorable.dtb
 
 dtb-$(CONFIG_ARCH_UNIPHIER) += \
+	uniphier-ph1-ld20-ref.dtb \
 	uniphier-ph1-ld4-ref.dtb \
 	uniphier-ph1-ld6b-ref.dtb \
 	uniphier-ph1-pro4-ace.dtb \