ARM: imx_v6_v7_defconfig: Select CONFIG_DRM_I2C_NXP_TDA998X

Select CONFIG_DRM_I2C_NXP_TDA998X so that HDMI output can work by
default on a imx6sx-udoo-neo board.

Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Author: Fabio Estevam

arch/arm/configs/imx_v6_v7_defconfig

@@ -274,6 +274,7 @@ CONFIG_VIDEO_OV5645=m
 CONFIG_VIDEO_ADV7180=m
 CONFIG_IMX_IPUV3_CORE=y
 CONFIG_DRM=y
+CONFIG_DRM_I2C_NXP_TDA998X=y
 CONFIG_DRM_MSM=y
 CONFIG_DRM_PANEL_LVDS=y
 CONFIG_DRM_PANEL_SIMPLE=y