[U-Boot] [PATCH v4 3/9] sunxi: add sun7i dram setup support

[Ian Campbell]

On Thu, 2014-05-01 at 19:40 +0100, Ian Campbell wrote:
> This patch adds DRAM initialisation support for the Allwinner A20 (sun7i)
> processor. This code will not been compiled until the build is hooked up in a
> later patch. It has been split out to keep the patches manageable.
> 
> Signed-off-by: Alexandru Gagniuc <mr.nuke.me at gmail.com>
> Signed-off-by: Emilio López <emilio at elopez.com.ar>
> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> Signed-off-by: Henrik Nordstrom <henrik at henriknordstrom.net>
> Signed-off-by: Jens Kuske <jenskuske at gmail.com>
> Signed-off-by: Luke Leighton <lkcl at lkcl.net>
> Signed-off-by: Oliver Schinagl <oliver at schinagl.nl>
> Signed-off-by: Siarhei Siamashka <siarhei.siamashka at gmail.com>
> Signed-off-by: Stefan Roese <sr at denx.de>
> Signed-off-by: Ian Campbell <ijc at hellion.org.uk>
> Cc: Tom Cubie <Mr.hipboi at gmail.com>
> ---
> v4: Based on d9fe0a1e061e "sunxi: mksunxiboot: remove unnecessary casts."

- removed unbounded loops
- support more dram clock speeds.