ARM: imx_v6_v7_defconfig: enable DRM_SII902X and DRM_DISPLAY_CONNECTOR

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>

arch/arm/configs/imx_v6_v7_defconfig

@@ -286,7 +286,9 @@ CONFIG_DRM_PANEL_LVDS=y
 CONFIG_DRM_PANEL_SIMPLE=y
 CONFIG_DRM_PANEL_EDP=y
 CONFIG_DRM_PANEL_SEIKO_43WVF1G=y
+CONFIG_DRM_DISPLAY_CONNECTOR=y
 CONFIG_DRM_LVDS_CODEC=m
+CONFIG_DRM_SII902X=y
 CONFIG_DRM_TI_TFP410=y
 CONFIG_DRM_DW_HDMI_AHB_AUDIO=m
 CONFIG_DRM_DW_HDMI_CEC=y