Enable the LVDS-to-HDMI bridge and the HDMI display connector drivers
used on the iMX53 QSB and QSRB boards with the HDMI mezzanine.

Cc: Chris Healy <cphealy@gmail.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Chris Healy <cphealy@gmail.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>