[U-Boot] [U-Boot, 7/8] rockchip: rk3128: add defconfig for evb-rk3128

[Philipp Tomsich]

> Enable board config for evb-rk3128.
> Serial output and eMMC works in this version.
> 
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
> 
>  configs/evb-rk3128_defconfig | 42 ++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 42 insertions(+)
>  create mode 100644 configs/evb-rk3128_defconfig
> 

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