[U-Boot] smartweb: use SPL_TINY_MEMSET

[Philipp Tomsich]

> The SPL code for smartweb is close to its limit and adding a few extra
> instructions to SPL will cause it to overrun its sram allotement (thus
> causing build failures).  To allow adding the 'spl_perform_fixups'
> extension point to SPL, we'll enable SPL_TINY_MEMSET for smartweb.
> 
> Signed-off-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
> 
>  configs/smartweb_defconfig | 1 +
>  1 file changed, 1 insertion(+)
> 

Applied to u-boot-rockchip, thanks!