[PATCH] tests: Avoid printf versions that uses floats

[Sebastian Huber]

I am not sure if we should introduce this Newlib-specific functions in 
throughout the code base. The siprintf() is currently not used. I am 
more in favour to enable the FPU for the corresponding tasks.

The rest of the patch series looks good.

-- 
Sebastian Huber, embedded brains GmbH

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