tegra: i2c: Select I2C ordering for Seaboard

Select the port ordering for I2C on Seaboard.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

board/nvidia/dts/tegra2-seaboard.dts

@@ -15,6 +15,11 @@
 		/* This defines the order of our USB ports */
 		usb0 = "/usb@c5008000";
 		usb1 = "/usb@c5000000";
+
+		i2c0 = "/i2c@7000d000";
+		i2c1 = "/i2c@7000c000";
+		i2c2 = "/i2c@7000c400";
+		i2c3 = "/i2c@7000c500";
 	};
 
 	memory {
@@ -24,6 +29,7 @@
 
 	/* This is not used in U-Boot, but is expected to be in kernel .dts */
 	i2c@7000d000 {
+		clock-frequency = <100000>;
 		pmic@34 {
 			compatible = "ti,tps6586x";
 			reg = <0x34>;
@@ -71,4 +77,16 @@
 	usb@c5004000 {
 		status = "disabled";
 	};
+
+	i2c@7000c000 {
+		clock-frequency = <100000>;
+	};
+
+	i2c@7000c400 {
+		status = "disabled";
+	};
+
+	i2c@7000c500 {
+		clock-frequency = <100000>;
+	};
 };