drivers: eth_sam_gmac: support reading MAC from I2C EEPROM

This patch adds support for reading MAC address from I2C EEPROM.
Only chips with 7-bit I2C device address are supported.

Change-Id: Ibedc33e54e33bdb901840e104063e2f4752b9123
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
2 files changed