ARM: dts: am57xx: cl-som-am57x: add I2C3 support

Enable I2C3 bus and add appropriate pinmux.
Signed-off-by: Dmitry Lifshitz <lifshitz@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am57xx-cl-som-am57x.dts

@@ -52,6 +52,13 @@ DRA7XX_CORE_IOPAD(0x3804, PIN_INPUT_PULLUP | MUX_MODE0)	/* i2c1_scl.scl */
 		>;
 	};
 
+	i2c3_pins_default: i2c3_pins_default {
+		pinctrl-single,pins = <
+			DRA7XX_CORE_IOPAD(0x36a4, PIN_INPUT| MUX_MODE10)	/* mcasp1_aclkx.i2c3_sda */
+			DRA7XX_CORE_IOPAD(0x36a8, PIN_INPUT| MUX_MODE10)	/* mcasp1_fsx.i2c3_scl */
+		>;
+	};
+
 	i2c4_pins_default: i2c4_pins_default {
 		pinctrl-single,pins = <
 			DRA7XX_CORE_IOPAD(0x36ac, PIN_INPUT| MUX_MODE10)	/* mcasp1_acl.i2c4_sda */
@@ -73,6 +80,13 @@ &i2c1 {
 	clock-frequency = <400000>;
 };
 
+&i2c3 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c3_pins_default>;
+	clock-frequency = <400000>;
+};
+
 &i2c4 {
 	status = "okay";
 	pinctrl-names = "default";