ramips: add missing pinmuxes to SoC dtsi

Add pinmuxes defined by some board which are including the dtsi files
to the dtsi files itself. Allows to reduce duplication.

Signed-off-by: Mathias Kresin <dev@kresin.me>

target/linux/ramips/dts/mt7620a.dtsi

@@ -365,6 +365,13 @@
 			};
 		};
 
+		mdio_refclk_pins: mdio_refclk {
+			mdio_refclk {
+				ralink,group = "mdio";
+				ralink,function = "refclk";
+			};
+		};
+
 		ephy_pins: ephy {
 			ephy {
 				ralink,group = "ephy";
@@ -399,6 +406,13 @@
 				ralink,function = "pcie rst";
 			};
 		};
+
+		pa_pins: pa {
+			pa {
+				ralink,group = "pa";
+				ralink,function = "pa";
+			};
+		};
 	};
 
 	rstctrl: rstctrl {

target/linux/ramips/dts/mt7620n.dtsi

@@ -228,6 +228,13 @@
 		state_default: pinctrl0 {
 		};
 
+		ephy_pins: ephy {
+			ephy {
+				ralink,group = "ephy";
+				ralink,function = "ephy";
+			};
+		};
+
 		spi_pins: spi {
 			spi {
 				ralink,group = "spi";

target/linux/ramips/dts/mt7628an.dtsi

@@ -298,6 +298,13 @@
 			};
 		};
 
+		i2s_pins: i2s {
+			i2s {
+				ralink,group = "i2s";
+				ralink,function = "i2s";
+			};
+		};
+
 		uart0_pins: uartlite {
 			uartlite {
 				ralink,group = "uart0";
@@ -340,12 +347,19 @@
 			};
 		};
 
-		pcm_i2s_pins: i2s {
-			i2s {
+		pcm_i2s_pins: pcm_i2s {
+			pcm_i2s {
 				ralink,group = "i2s";
 				ralink,function = "pcm";
 			};
 		};
+
+		refclk_pins: refclk {
+			refclk {
+				ralink,group = "refclk";
+				ralink,function = "refclk";
+			};
+		};
 	};
 
 	rstctrl: rstctrl {

target/linux/ramips/dts/rt3050.dtsi

@@ -260,6 +260,13 @@
 			};
 		};
 
+		rgmii_pins: rgmii {
+			rgmii {
+				ralink,group = "rgmii";
+				ralink,function = "rgmii";
+			};
+		};
+
 		uartlite_pins: uartlite {
 			uart {
 				ralink,group = "uartlite";

target/linux/ramips/dts/rt3352.dtsi

@@ -262,6 +262,20 @@
 			};
 		};
 
+		mdio_pins: mdio {
+			mdio {
+				ralink,group = "mdio";
+				ralink,function = "mdio";
+			};
+		};
+
+		rgmii_pins: rgmii {
+			rgmii {
+				ralink,group = "rgmii";
+				ralink,function = "rgmii";
+			};
+		};
+
 		spi_pins: spi {
 			spi {
 				ralink,group = "spi";