src/southbridge: Add and update license headers

This change adds and updates headers in all of the southbridge files
that had missing or unrecognized headers.  After this goes in, we can
turn on lint checking for headers in all southbridge directories.

Change-Id: I09614730bfd4db923dda103bd07bab02836a4c92
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/26570
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
30 files changed