[U-Boot] blackfin: make name_to_gpio be a weak symbol

[Tom Rini]

On Thu, Mar 27, 2014 at 08:34:13PM +0000, Ian Campbell wrote:

> This required moving it into a C file from the header.
> 
> The only user of a non-default name_to_gpio is blackfin, therefore build tested
> with the blackfin bct-brettl2 build, which is one I picked at random. Also
> tested with a build for the ARM tec board which uses the default/fallback
> implementation. Inspection with objdump shows that both have done the right
> thing.
> 
> This change was requested by Marek during review of the sunxi patch series.
> 
> Signed-off-by: Ian Campbell <ijc at hellion.org.uk>
> Cc: Marek Vasut <marex at denx.de>
> Cc: Wolfgang Denk <wd at denx.de>
> Cc: Sonic Zhang <sonic.adi at gmail.com>

Applied to u-boot/master, thanks!

-- 
Tom
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