EEPROMs (I2C)
  
  Required properties:
  
    - compatible : should be "<manufacturer>,<type>"
  		 If there is no specific driver for <manufacturer>, a generic
  		 driver based on <type> is selected. Possible types are:
  		 24c00, 24c01, 24c02, 24c04, 24c08, 24c16, 24c32, 24c64,
  		 24c128, 24c256, 24c512, 24c1024, spd
  
    - reg : the I2C address of the EEPROM
  
  Optional properties:
  
    - pagesize : the length of the pagesize for writing. Please consult the
                 manual of your device, that value varies a lot. A wrong value
  	       may result in data loss! If not specified, a safety value of
  	       '1' is used which will be very slow.
  
    - read-only: this parameterless property disables writes to the eeprom
  
  Example:
  
  eeprom@52 {
  	compatible = "atmel,24c32";
  	reg = <0x52>;
  	pagesize = <32>;
  };