GitLab

- Remove the copyright listings and refer the reader to the source
  files.
- Update the author list to those which have copyright messages in the
source files.
- Correct the license from GPL v2+ to (GPL v2, with some files under
  later versions as well)

Corresponding to flashrom svn r375 and coreboot v2 svn r3852.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>