nitrogen6x: config: enable "i2c edid"

Enable the "i2c edid" command to query data from an attached
HDMI monitor.

Usage is typically this:

        U-Boot > i2c dev 1
        U-Boot > i2c edid 0x50
        ...

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
1 file changed