uboot-phytec

xilinx: common: Remove !DM_i2C code for reading mac from eeprom

All platforms are converted to DM_I2C that's why there is no reason to
keep this code here.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Heiko Schocher <hs@denx.de>