[U-Boot] Unused video drivers

[Andy Pont]

Hi Nikita,

> CONFIG_EXYNOS_PWM_BL
> CONFIG_L5F31188
> CONFIG_SED156X
> CONFIG_VIDEO_COREBOOT
> CONFIG_VIDEO_IMX25LCDC
> CONFIG_VIDEO_SED13806
> CONFIG_VIDEO_SMI_LYNXEM
> CONFIG_AM335X_LCD

I believe that Hannes Petermaier recently posted some board updates that use
the CONFIG_AM335X_LCD option and I guess they are still under review and
haven't been merged yet.

Regards,

Andy.