[DRIVERS] Porting of additional NVMEM configurations for Atmel EEPROM
Add compatible device atmel,24aa025 with flag AT24_FLAG_SECO_PARTITION in device data. Add serial number, partition number and MAC address nvmem configurations with dedicated read/write functions. Ported from the stable Linux kernel version 4.4 with some fixes. Author of the original implementation: Giuseppe Pagano Usage example in attachment to this commit.