Requested by Dave Airlie, so that we automatically record the pull
request submitter somewhere. After quick irc chat we decided to put it
at the bottom, to avoid confusion with the From: git format-patch
inserts at the top for authors not matching the patch submitter.

Requested-by: Dave Airlie <airlied@redhat.com>
Cc: Dave Airlie <airlied@redhat.com>
Acked-by: Dave Airlie <airlied@redhat.com>
Tested-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>