mbxxx I2C driver.

This patch add the I2C driver for mbxxx platform to communicate with
devices connected to the SC2 I2C bus.
Signed-off-by: Maria Laura Stefanizzi <laura28582@gmail.com>
Integrate I2C driver into board initializzation

This patch add I2C initializzation for board with I2C devices.
Signed-off-by: Maria Laura Stefanizzi <laura28582@gmail.com>
MEMS I2C integration.

This patch allows the MEMS driver to use the i2c driver.
Signed-off-by: Maria Laura Stefanizzi <laura28582@gmail.com>
mbxxx eeprom driver

This patch adds the eeprom driver needed to access M24C64
eeprom which is on some mbxxx boards.
Signed-off-by: Maria Laura Stefanizzi <laura28582@gmail.com>
Eeprom-test example modified

This patch improves the eeprom-test example adding more
tests on the eeprom read/write procedures.
Merge pull request #477 from MariaLauraStefanizzi/eeprom

i2c and eeprom drivers for mbxxx boards