mips: octeon: ebb7304: Add support for some I2C devices

This patch adds support for the following I2C devices connected to
I2C bus 0 on the Octeon EBB7304:
- Dallas DS1337 RTC
- TLV EEPROM

Signed-off-by: Aaron Williams <awilliams@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Chandrakala Chavva <cchavva@marvell.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

arch/mips/dts/mrvl,octeon-ebb7304.dts

@@ -115,6 +115,17 @@
 &i2c0 {
 	u-boot,dm-pre-reloc;	/* Needed early for DDR SPD EEPROM */
 	clock-frequency = <100000>;
+
+	rtc@68 {
+		compatible = "dallas,ds1337";
+		reg = <0x68>;
+	};
+
+	tlv-eeprom@56 {
+		compatible = "atmel,24c256", "microchip,24lc256";
+		reg = <0x56>;
+		pagesize = <64>;
+	};
 };
 
 &i2c1 {