ARM: mvebu: switch db-88f6820-amc to DM for i2c

Move existing configuration from header file to defconfig or dts as
appropriate.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
3 files changed