[U-Boot] [RFC] Removal of CREDITS

[Masahiro Yamada]

Hi.


The "CREDITS" file at the top directory does not seem
to be used these days.

The contents are mostly credits of old board supports.

We use MAINTAINERS for the maintainership of the supported boards.

For dead boards, we have clues in doc/README.scrapyard and
also imperishable history in git-log.

I think we do not need the CREDITS file any more.

Comments are welcome.


Best Regards
Masahiro Yamada