ARM: config: ixp4xx: Disable legacy EEPROM driver

This disables the legacy EEPROM driver, we only need
the new AT24 driver.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220911214042.1857352-1-linus.walleij@linaro.org

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Signed-off-by: Arnd Bergmann <arnd@arndb.de>