ARM: dts: AM33XX: Add default pinctrl binding for UART0 device

Add pin control binding for UART0 device nodes in all
board specific DT files.
Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Acked-by: Matt Porter <mporter@ti.com>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>

arch/arm/boot/dts/am335x-bone.dts

@@ -43,10 +43,20 @@ i2c0_pins: pinmux_i2c0_pins {
 				0x18c 0x30	/* i2c0_scl.i2c0_scl PULLUP | INPUTENABLE | MODE0 */
 			>;
 		};
+
+		uart0_pins: pinmux_uart0_pins {
+			pinctrl-single,pins = <
+				0x170 0x30	/* uart0_rxd.uart0_rxd PULLUP | INPUTENABLE | MODE0 */
+				0x174 0x00	/* uart0_txd.uart0_txd PULLDOWN | MODE0 */
+			>;
+		};
 	};
 
 	ocp {
 		uart0: serial@44e09000 {
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart0_pins>;
+
 			status = "okay";
 		};
 

arch/arm/boot/dts/am335x-evm.dts

@@ -58,10 +58,20 @@ i2c1_pins: pinmux_i2c1_pins {
 				0x15c 0x32	/* spi0_cs0.i2c1_scl PULLUP | INPUTENABLE | MODE2 */
 			>;
 		};
+
+		uart0_pins: pinmux_uart0_pins {
+			pinctrl-single,pins = <
+				0x170 0x30	/* uart0_rxd.uart0_rxd PULLUP | INPUTENABLE | MODE0 */
+				0x174 0x00	/* uart0_txd.uart0_txd PULLDOWN | MODE0 */
+			>;
+		};
 	};
 
 	ocp {
 		uart0: serial@44e09000 {
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart0_pins>;
+
 			status = "okay";
 		};
 

arch/arm/boot/dts/am335x-evmsk.dts

@@ -58,10 +58,20 @@ i2c0_pins: pinmux_i2c0_pins {
 				0x18c 0x30	/* i2c0_scl.i2c0_scl PULLUP | INPUTENABLE | MODE0 */
 			>;
 		};
+
+		uart0_pins: pinmux_uart0_pins {
+			pinctrl-single,pins = <
+				0x170 0x30	/* uart0_rxd.uart0_rxd PULLUP | INPUTENABLE | MODE0 */
+				0x174 0x00	/* uart0_txd.uart0_txd PULLDOWN | MODE0 */
+			>;
+		};
 	};
 
 	ocp {
 		uart0: serial@44e09000 {
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart0_pins>;
+
 			status = "okay";
 		};