Small EEPROMs and EEPROM-write vendor command

[makestuff]

Comment from Maarten Brock:

24LC16 has only 16 bytes in a page. I don't think you can assume much about the page size in fx2loader. And the really small ones have single byte addresses and possibly no pages at all. They also should use different I2C addresses. Further, at the link below it's mentioned that 0xA2 is only meant for small eeproms and 0xA9 is for large types. http://www.cypress.com/?id=4&rID=34127

See here for Florian's 32-byte-page patch.