[U-Boot] [PATCH v1 3/9] sunxi: initial sun7i dram setup support

[Stefan]

> Unfortunately the only documentation we have on the sun7i DRAM
> controller is Allwinner boot0 + boot1 code, and that code uses.. magic
> numbers & shifts with no explanations.

To avoid having to explain this over-and-over again, the code could
include some comment(s) pointing out that these are unexplained magic
constants from Allwinner's code.


        Stefan