dove db: support for adi9889 HDMI to DVI module

BugLink: http://bugs.launchpad.net/bugs/611634

the board module parameter front_panel must be 0 in order to enable the LCD0
configuration for the adi9889 module.

Signed-off-by: Eric Miao <eric.miao@canonical.com>
Signed-off-by: Brad Figg <brad.figg@canonical.com>