Copyright and license notices in new and ported code

[Amaan Cheval]

Hi!

In some RTEMS source files I see a series of copyright notices,
including those for individuals and corporations, for eg.:
https://git.rtems.org/rtems/tree/cpukit/score/cpu/arm/include/rtems/score/cpu.h#n7
https://git.rtems.org/rtems/commit/?id=660db8c86fa16dc67c40bdeebbf671e50a7f3087
(again, in cpu.h)

I was just wondering how this ought to be for new code. Is this meant
to be handled on a file-by-file basis? I don't see anything about it
on the wiki either.

For now I'm using this, let me know if I need to add OAR to the comment too:

https://github.com/AmaanC/rtems-gsoc18/blob/ac/daily-01-compile-stub/cpukit/score/cpu/x86_64/include/rtems/score/cpu.h#L10

I haven't yet, but I'll likely also port FreeBSD sources soon - in
that case I ought to just preserve the file as much as possible to
make future updates easier, right? (That is, no changes made to the
copyright or added to the code if we can avoid it (by adding new files
for customizations on top, for eg.)).

Cheers