[PATCH 4/4] rk3399: Don't enable the debug UART if there is no driver

[Philipp Tomsich]

On Wed, 3 Nov 2021 at 14:16, Simon Glass <sjg at chromium.org> wrote:
>
> Some boards do not enable SPL_SERIAL so cannot use the debug UART. Add
> this condition to the code and drop use of the preprocessor while we are
> here.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>

Reviewed-by: Philipp Tomsich <philipp.tomsich at vrull.eu>