[U-Boot] [U-Boot,v3,1/2] rockchip: rk322x: add sdram driver

[Philipp Tomsich]

> Add driver for rk322x to support sdram initialize in SPL.
> 
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> ---
> 
> Changes in v3:
> - move rk332x sdram driver to driver/ram
> - do the ram init in TPL instad of SPL
> 
>  arch/arm/include/asm/arch-rockchip/sdram_rk322x.h | 581 +++++++++++++++
>  drivers/ram/rockchip/Makefile                     |   1 +
>  drivers/ram/rockchip/sdram_rk322x.c               | 855 ++++++++++++++++++++++
>  3 files changed, 1437 insertions(+)
>  create mode 100644 arch/arm/include/asm/arch-rockchip/sdram_rk322x.h
>  create mode 100644 drivers/ram/rockchip/sdram_rk322x.c
> 

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