arm64: dts: ti: k3-j721e-sk: Add missing uart pinmuxes

Rather than depend on the default pinmuxes, explicitly describe the
pinmux
Signed-off-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20230601183151.1000157-2-nm@ti.comSigned-off-by: Vignesh Raghavendra <vigneshr@ti.com>

arch/arm64/boot/dts/ti/k3-j721e-sk.dts

@@ -302,6 +302,13 @@ J721E_IOPAD(0x1ec, PIN_OUTPUT, 0) /* (AB3) UART0_TXD */
 		>;
 	};
 
+	main_uart1_pins_default: main-uart1-pins-default {
+		pinctrl-single,pins = <
+			J721E_IOPAD(0x1f8, PIN_INPUT, 0) /* (AA4) UART1_RXD */
+			J721E_IOPAD(0x1fc, PIN_OUTPUT, 0) /* (AB4) UART1_TXD */
+		>;
+	};
+
 	main_i2c0_pins_default: main-i2c0-pins-default {
 		pinctrl-single,pins = <
 			J721E_IOPAD(0x220, PIN_INPUT_PULLUP, 0) /* (AC5) I2C0_SCL */
@@ -495,6 +502,22 @@ J721E_WKUP_IOPAD(0xd4, PIN_OUTPUT, 7) /* (G26) WKUP_GPIO0_9 */
 		>;
 	};
 
+	wkup_uart0_pins_default: wkup-uart0-pins-default {
+		pinctrl-single,pins = <
+			J721E_WKUP_IOPAD(0xa0, PIN_INPUT, 0) /* (J29) WKUP_UART0_RXD */
+			J721E_WKUP_IOPAD(0xa4, PIN_OUTPUT, 0) /* (J28) WKUP_UART0_TXD */
+		>;
+	};
+
+	mcu_uart0_pins_default: mcu-uart0-pins-default {
+		pinctrl-single,pins = <
+			J721E_WKUP_IOPAD(0xf0, PIN_INPUT, 2) /* (D26) MCU_I3C0_SCL.MCU_UART0_CTSn */
+			J721E_WKUP_IOPAD(0xf4, PIN_OUTPUT, 2)/* (D25) MCU_I3C0_SDA.MCU_UART0_RTSn */
+			J721E_WKUP_IOPAD(0xe4, PIN_INPUT, 0) /* (H28) WKUP_GPIO0_13.MCU_UART0_RXD */
+			J721E_WKUP_IOPAD(0xe0, PIN_OUTPUT, 0)/* (G29) WKUP_GPIO0_12.MCU_UART0_TXD */
+		>;
+	};
+
 	wkup_i2c0_pins_default: wkup-i2c0-pins-default {
 		pinctrl-single,pins = <
 			J721E_WKUP_IOPAD(0xf8, PIN_INPUT_PULLUP, 0) /* (J25) WKUP_I2C0_SCL */
@@ -513,11 +536,14 @@ J721E_WKUP_IOPAD(0xdc, PIN_INPUT, 7) /* (H27) WKUP_GPIO0_11 */
 &wkup_uart0 {
 	/* Wakeup UART is used by System firmware */
 	status = "reserved";
+	pinctrl-names = "default";
+	pinctrl-0 = <&wkup_uart0_pins_default>;
 };
 
 &mcu_uart0 {
 	status = "okay";
-	/* Default pinmux */
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_uart0_pins_default>;
 };
 
 &main_uart0 {
@@ -530,7 +556,8 @@ &main_uart0 {
 
 &main_uart1 {
 	status = "okay";
-	/* Default pinmux */
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_uart1_pins_default>;
 };
 
 &main_sdhci0 {