ARM: dts: uniphier: add NAND pinmux node

This commit adds pin-mux nodes for the NAND controller.
Some SoCs support 2 chip selects and the others only support
1 chip select.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

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

@@ -68,6 +68,16 @@
 		function = "i2c4";
 	};
 
+	pinctrl_nand: nand_grp {
+		groups = "nand";
+		function = "nand";
+	};
+
+	pinctrl_nand2cs: nand2cs_grp {
+		groups = "nand", "nand_cs1";
+		function = "nand";
+	};
+
 	pinctrl_uart0: uart0_grp {
 		groups = "uart0";
 		function = "uart0";