[U-Boot] Lots of SPDX-License Identifer have a trailing space

[Masahiro Yamada]

Hello Wolfgang

> > Is this space the one intentinally added?
> > (If not, I can send a patch to fix it.)
> 
> No, this is definitely not intentional.

OK.
SPDX might be your turf, so I will hold back sending a patch.



Best Regards
Masahiro Yamada