[U-Boot] [PATCH] Fix Ymodem build when DEBUG and CONFIG_USE_TINY_PRINTF are selected

[Joe Hershberger]

On Thu, May 3, 2018 at 6:45 AM, Alex Kiernan <alex.kiernan at gmail.com> wrote:
> Attempting to build with both DEBUG and CONFIG_USE_TINY_PRINTF along
> with CONFIG_SPL_YMODEM_SUPPORT fails at link time:
>
>   common/built-in.o: In function `zm_dprintf':
>   common/xyzModem.c:190: undefined reference to `vsprintf'
>
> Disable Ymodem debug if we don't have full vsprintf support.
>
> Signed-off-by: Alex Kiernan <alex.kiernan at gmail.com>

Reviewed-by: Joe Hershberger <joe.hershberger at ni.com>