dtc: Whitespace cleanup

[Jon Loeliger]

So, like, the other day David Gibson mumbled:
> This large patch removes all trailing whitespace from dtc (including
> libfdt, the testsuite and documentation).  It also removes a handful
> of redundant blank lines (at the end of functions, or when there are
> two blank lines together for no particular reason).
> 
> As well as anything else, this means that quilt won't whinge when I go
> to convert the whole of libfdt into a patch to apply to the kernel.
> 
> Signed-off-by: David Gibson <david at gibson.dropbear.id.au>

Applied.

Thanks,
jdl