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>