northbridg/via/vx900: Doxygen fixes

- @todo has to be lowercase for doxygen
- Fix some parameters that had changed in the code.
- The @file entries needed to be more specific.

Change-Id: Icdce08735f581609cd25cce41e986c71435368a4
Signed-off-by: Martin Roth <gaumless@gmail.com>
Reviewed-on: http://review.coreboot.org/8154
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
7 files changed