ARM: dts: uniphier: add SPI pin-mux node

This commit adds pin-mux nodes for SPI controller.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/boot/dts/uniphier-pinctrl.dtsi

@@ -126,6 +126,26 @@
 		function = "sd1";
 	};
 
+	pinctrl_spi0: spi0 {
+		groups = "spi0";
+		function = "spi0";
+	};
+
+	pinctrl_spi1: spi1 {
+		groups = "spi1";
+		function = "spi1";
+	};
+
+	pinctrl_spi2: spi2 {
+		groups = "spi2";
+		function = "spi2";
+	};
+
+	pinctrl_spi3: spi3 {
+		groups = "spi3";
+		function = "spi3";
+	};
+
 	pinctrl_system_bus: system-bus {
 		groups = "system_bus", "system_bus_cs1";
 		function = "system_bus";