Based on a unpublished patch from Andrew Lunn:

    When the switch is hardware reset, it reads the contents of the
    EEPROM. This can contain instructions for programming values into
    registers and to perform waits between such programming. Reading
    the EEPROM can take longer than the 100ms
    mv88e6xxx_hardware_reset() waits after deasserting the reset
    GPIO. So poll the EEPROM done bit to ensure it is complete.

    Signed-off-by: Andrew Lunn <andrew@lunn.ch>

orignal patch augmented to have necessary Global 1 plubming, ported to
Barebox and slightly changed.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>