[U-Boot] [U-Boot, v2, 01/19] lib: Allow using display_buffer() in SPL

[Philipp Tomsich]

> At present this function uses printf() format strings that are not
> supported in SPL, so the output just consists of %llx strings on 64-bit.
> machines. Fix this by adding a special case.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
> 
> Changes in v2: None
> 
>  lib/display_options.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 

Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>