ARM: dts: uniphier: sync DT with Linux 4.14-rc5

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/dts/uniphier-ld4-ref.dts b/arch/arm/dts/uniphier-ld4-ref.dts
index 0fd66e7..fb94df4 100644
--- a/arch/arm/dts/uniphier-ld4-ref.dts
+++ b/arch/arm/dts/uniphier-ld4-ref.dts
@@ -68,3 +68,7 @@
 &usb1 {
 	status = "okay";
 };
+
+&nand {
+	status = "okay";
+};