scripts: set_maintainer: fix author == maintainer fallback logic

The "Submitter is same as Assignee" is comparing strings to <Area> and
always failing the condition, fix it by dropping the ".name".

Tested with ./scripts/set_assignees.py -v -y -P 67526 (now falls back to
the other maintainer as it should).

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>