staging: mt7621-dts: match pinctrl nodes with its binding documentation

According to the binding documentation pinctrl related nodes
must use '-pins$' and ''^(.*-)?pinmux$'' as names. Change all
to properly match them. Also default state is for consumer
nodes and shall be removed from here.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20210104150651.32083-1-sergio.paracuellos@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-dts/mt7621.dtsi

@@ -222,89 +222,84 @@ hsdma: hsdma@7000 {
 
 	pinctrl: pinctrl {
 		compatible = "ralink,rt2880-pinmux";
-		pinctrl-names = "default";
-		pinctrl-0 = <&state_default>;
-
-		state_default: pinctrl0 {
-		};
 
-		i2c_pins: i2c0 {
-			i2c0 {
+		i2c_pins: i2c0-pins {
+			pinmux {
 				groups = "i2c";
 				function = "i2c";
 			};
 		};
 
-		spi_pins: spi0 {
-			spi0 {
+		spi_pins: spi0-pins {
+			pinmux {
 				groups = "spi";
 				function = "spi";
 			};
 		};
 
-		uart1_pins: uart1 {
-			uart1 {
+		uart1_pins: uart1-pins {
+			pinmux {
 				groups = "uart1";
 				function = "uart1";
 			};
 		};
 
-		uart2_pins: uart2 {
-			uart2 {
+		uart2_pins: uart2-pins {
+			pinmux {
 				groups = "uart2";
 				function = "uart2";
 			};
 		};
 
-		uart3_pins: uart3 {
-			uart3 {
+		uart3_pins: uart3-pins {
+			pinmux {
 				groups = "uart3";
 				function = "uart3";
 			};
 		};
 
-		rgmii1_pins: rgmii1 {
-			rgmii1 {
+		rgmii1_pins: rgmii1-pins {
+			pinmux {
 				groups = "rgmii1";
 				function = "rgmii1";
 			};
 		};
 
-		rgmii2_pins: rgmii2 {
-			rgmii2 {
+		rgmii2_pins: rgmii2-pins {
+			pinmux {
 				groups = "rgmii2";
 				function = "rgmii2";
 			};
 		};
 
-		mdio_pins: mdio0 {
-			mdio0 {
+		mdio_pins: mdio0-pins {
+			pinmux {
 				groups = "mdio";
 				function = "mdio";
 			};
 		};
 
-		pcie_pins: pcie0 {
-			pcie0 {
+		pcie_pins: pcie0-pins {
+			pinmux {
 				groups = "pcie";
 				function = "gpio";
 			};
 		};
 
-		nand_pins: nand0 {
-			spi-nand {
+		nand_pins: nand0-pins {
+			spi-pinmux {
 				groups = "spi";
 				function = "nand1";
 			};
 
-			sdhci-nand {
+			sdhci-pinmux {
 				groups = "sdhci";
 				function = "nand2";
 			};
 		};
 
-		sdhci_pins: sdhci0 {
-			sdhci0 {
+		sdhci_pins: sdhci0-pins {
+			pinmux {
 				groups = "sdhci";
 				function = "sdhci";
 			};