[U-Boot] Many unused variable warnings

[Tom Rini]

On Thu, Dec 15, 2016 at 12:55:36PM +0900, Masahiro Yamada wrote:

> Hi.
> 
> The recent GCC versions catch unused variables.
> 
> This makes build testing noisy.
> 
> Of course, we could use old GCC when running Buildman,
> but it would be nicer to eliminate the root causes.
> 
> I got the following when I recently ran Buildman with arm/aarch64 GCC 6.1.

What's more worrying to me is that we need to adapt our RSA using code
for openssl 1.1 which is the default in debian/unstable, which is the
easiest way to get gcc 6.1 toolchains.  I might take a quick stab at
fixing some of the warnings, thanks for the reminder!

-- 
Tom
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