[PATCH] ep93xx: update i2c support

[Ryan Mallon]

H Hartley Sweeten wrote:
> Update the ep93xx i2c support:
> 
>   1) The platform init code passes the configuration data for the
>      i2c-gpio driver.  This allows any gpio pin do be used for the
>      sda and scl pins.  It also allows the platform to specify the
>      udelay and timeout.
>   2) Program the gpio configuration register to enable/disable the
>      open drain drivers.  Note that this really only works if the
>      sda and scl pins are set to EP93XX_GPIO_LINE_EEDAT and
>      EP93XX_GPIO_LINE_EECLK.

Maybe print a warning then if sda/scl_is_open_drain is set and the pin
is not set to EEDAT/EECLK.

~Ryan

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