cpp: doc: added documentation to the C++ support.

Documented the functions which support the C++ language.

Signed-off-by: Michel Megens <dev@michelmegens.net>
eeprom: doc: documented the 24C02 core functions.

Added documentation to the implementation of the 24C02 EEPROM driver.

Signed-off-by: Michel Megens <dev@michelmegens.net>
eeprom: doc: documented the EEPROM core header.

Added documentation to the I2C core header.

Signed-off-by: Michel Megens <dev@michelmegens.net>