CONFIG_PCA953X is not needed because of PCA953X is integrated in gpio
subsystem already. That's why also remove CMD_PCA953X which is only for
this driver.

zcu102/zcu104-revC/zcu106/zcu111 contain links to eeprom which stores MAC address.

DM_I2C is not enabled for the whole SoC because it increase size for
mini configurations and there is no I2C symbol present to setup
dependencies.

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