arm: dts: k3-j721e-common-proc-board: Enable I2C expander for SPL

IO expanders are required to power cycle SD card. So enable the same
Signed-off-by: NVignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: NLokesh Vutla <lokeshvutla@ti.com>

arch/arm/dts/k3-j721e-common-proc-board-u-boot.dtsi

@@ -337,3 +337,15 @@
 &wkup_i2c0 {
 	u-boot,dm-spl;
 };
+
+&main_i2c0 {
+	u-boot,dm-spl;
+};
+
+&main_i2c0_pins_default {
+	u-boot,dm-spl;
+};
+
+&exp2 {
+	u-boot,dm-spl;
+};

arch/arm/dts/k3-j721e-r5-common-proc-board.dts

@@ -140,6 +140,13 @@
 			J721E_IOPAD(0x25c, PIN_INPUT, 0) /* (R28) MMC1_SDWP */
 		>;
 	};
+
+	main_i2c0_pins_default: main-i2c0-pins-default {
+		pinctrl-single,pins = <
+			J721E_IOPAD(0x220, PIN_INPUT_PULLUP, 0) /* (AC5) I2C0_SCL */
+			J721E_IOPAD(0x224, PIN_INPUT_PULLUP, 0) /* (AA5) I2C0_SDA */
+		>;
+	};
 };
 
 &wkup_uart0 {
@@ -225,4 +232,24 @@
 	ti,vbus-divider;
 };
 
+&main_i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_i2c0_pins_default>;
+	clock-frequency = <400000>;
+
+	exp1: gpio@20 {
+		compatible = "ti,tca6416";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+
+	exp2: gpio@22 {
+		compatible = "ti,tca6424";
+		reg = <0x22>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+};
+
 #include "k3-j721e-common-proc-board-u-boot.dtsi"