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/uniphier-pinctrl.dtsi b/arch/arm/dts/uniphier-pinctrl.dtsi
index 494139a..988e60a 100644
--- a/arch/arm/dts/uniphier-pinctrl.dtsi
+++ b/arch/arm/dts/uniphier-pinctrl.dtsi
@@ -37,6 +37,11 @@
 		function = "i2c3";
 	};
 
+	pinctrl_i2c4: i2c4_grp {
+		groups = "i2c4";
+		function = "i2c4";
+	};
+
 	pinctrl_sd: sd_grp {
 		groups = "sd";
 		function = "sd";