ARM: uniphier: add ProXstream2 and PH1-LD6b support

The DDR SDRAM initialization code has not been mainlined yet, but
U-Boot proper should work.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 0a7d184..5f10243 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -47,7 +47,9 @@
 	uniphier-ph1-pro4-ref.dtb \
 	uniphier-ph1-pro5-4kbox.dtb \
 	uniphier-ph1-sld3-ref.dtb \
-	uniphier-ph1-sld8-ref.dtb
+	uniphier-ph1-sld8-ref.dtb \
+	uniphier-proxstream2-gentil.dtb \
+	uniphier-proxstream2-vodka.dtb
 dtb-$(CONFIG_ARCH_ZYNQ) += zynq-zc702.dtb \
 	zynq-zc706.dtb \
 	zynq-zed.dtb \