[U-Boot] [U-Boot,8/8] rockchip: rk3128: add sdram driver

[Philipp Tomsich]

> RK3128 support up to 2GB DDR3 sdram, one channel, 32bit data width.
> 
> This patch is only used for U-Boot, but not for SPL which will
> comes later, maybe after we merge all the common code into a common
> file.
> 
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> ---
> 
>  drivers/ram/rockchip/Makefile       |  1 +
>  drivers/ram/rockchip/sdram_rk3128.c | 60 +++++++++++++++++++++++++++++++++++++
>  2 files changed, 61 insertions(+)
>  create mode 100644 drivers/ram/rockchip/sdram_rk3128.c
> 

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