[PATCH] config: Enable USB Keyboard support on RPi4

[Sylwester Nawrocki]

Hi Matthias,

On 08.05.2020 17:55, Matthias Brugger wrote:
> It seems we are missing
> CONFIG_SYS_STDIO_DEREGISTER=y
> at least for me without this, U-Boot does not build.

Isn't it selected by USB_KEYBOARD? I also had related build issues
which disappeared after running "make clean".

-- 
Regards,
Sylwester