[U-Boot] rockchip: rk322x: ram: enable DRAM init in SPL instead of TPL

[Philipp Tomsich]

> Patch for rk322x TPL is not merged, and only SPL is available now,
> enable the sdram driver in SPL first. We should update back to TPL
> after TPL is enabled for rk322x.
> 
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
> 
>  drivers/ram/rockchip/sdram_rk322x.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 

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