Drop multiple forwards to man page and add a single one more prominently

Drop usage information that is already mentioned in the man page.

Corresponding to flashrom svn r827.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
1 file changed