uboot-imx

dreamplug: switch to GENERIC_BOARD

Built and booted to a Linux prompt with no issues discovered. network and usb
access to the external mmc are ok. (my internal mmc is knackered at the h/w
level).

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Acked-By: Prafulla Wadaskar <prafulla@marvell.com>