northbridge/amd: Doxygen fixes

- Add missing parameter names in several files
- remove parameter types in several files
- remove lines from doxygen documentation.  These should be outside the
doxygen comments.
- Some of the comments shouldn't have been doxygen style.  Turn these
into regular non-doxygen comments.

Change-Id: Ieccfe237385efee007b48308d58eb0a6a12f5bfa
Signed-off-by: Martin Roth <gaumless@gmail.com>
Reviewed-on: http://review.coreboot.org/8153
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
9 files changed